diff --git a/code/__HELPERS/qdel.dm b/code/__HELPERS/qdel.dm
index 14b1f9d9594..e8a11f27a66 100644
--- a/code/__HELPERS/qdel.dm
+++ b/code/__HELPERS/qdel.dm
@@ -1,2 +1,2 @@
 #define QDEL_IN(item, time) addtimer(GLOBAL_PROC, "qdel", time, FALSE, item)
-#define QDEL_NULL(item) qdel(item); item = null
\ No newline at end of file
+#define QDEL_NULL(item) if(item) { qdel(item); item = null }
\ No newline at end of file
diff --git a/code/game/machinery/camera/camera.dm b/code/game/machinery/camera/camera.dm
index f98c84c61ac..ca312efc6a7 100644
--- a/code/game/machinery/camera/camera.dm
+++ b/code/game/machinery/camera/camera.dm
@@ -51,18 +51,19 @@
 
 /obj/machinery/camera/Destroy()
 	toggle_cam(null, 0) //kick anyone viewing out
-	if(assembly)
-		qdel(assembly)
-		assembly = null
+	QDEL_NULL(assembly)
 	if(istype(bug))
 		bug.bugged_cameras -= src.c_tag
 		if(bug.current == src)
 			bug.current = null
 		bug = null
-	qdel(wires)
-	wires = null
+	QDEL_NULL(wires)
 	cameranet.removeCamera(src) //Will handle removal from the camera network and the chunks, so we don't need to worry about that
 	cameranet.cameras -= src
+	var/area/ai_monitored/A = get_area(src)
+	if(istype(A))
+		A.motioncamera = null
+	area_motion = null
 	return ..()
 
 /obj/machinery/camera/emp_act(severity)
diff --git a/code/game/machinery/camera/camera_assembly.dm b/code/game/machinery/camera/camera_assembly.dm
index 99e9273b682..11fcede1fe9 100644
--- a/code/game/machinery/camera/camera_assembly.dm
+++ b/code/game/machinery/camera/camera_assembly.dm
@@ -20,6 +20,12 @@
 				4 = Screwdriver panel closed and is fully built (you cannot attach upgrades)
 	*/
 
+/obj/item/weapon/camera_assembly/Destroy()
+	for(var/thing in upgrades)
+		qdel(thing)
+	upgrades.Cut()
+	return ..()
+
 /obj/item/weapon/camera_assembly/attackby(obj/item/W, mob/living/user, params)
 
 	switch(state)
diff --git a/code/game/machinery/cloning.dm b/code/game/machinery/cloning.dm
index 5d8372607d8..7921defd40f 100644
--- a/code/game/machinery/cloning.dm
+++ b/code/game/machinery/cloning.dm
@@ -104,13 +104,17 @@
 /obj/item/weapon/disk/data
 	name = "Cloning Data Disk"
 	icon_state = "datadisk0" //Gosh I hope syndies don't mistake them for the nuke disk.
-	var/datum/dna2/record/buf=null
+	var/datum/dna2/record/buf = null
 	var/read_only = 0 //Well,it's still a floppy disk
 
 /obj/item/weapon/disk/data/proc/Initialize()
 	buf = new
 	buf.dna=new
 
+/obj/item/weapon/disk/data/Destroy()
+	QDEL_NULL(buf)
+	return ..()
+
 /obj/item/weapon/disk/data/demo
 	name = "data disk - 'God Emperor of Mankind'"
 	read_only = 1
diff --git a/code/game/machinery/doors/brigdoors.dm b/code/game/machinery/doors/brigdoors.dm
index ecdd959f717..7ec9630a54c 100644
--- a/code/game/machinery/doors/brigdoors.dm
+++ b/code/game/machinery/doors/brigdoors.dm
@@ -63,6 +63,10 @@
 			stat |= BROKEN
 		update_icon()
 
+/obj/machinery/door_timer/Destroy()
+	QDEL_NULL(Radio)
+	targets.Cut()
+	return ..()
 
 //Main door timer loop, if it's timing and time is >0 reduce time by 1.
 // if it's less than 0, open door, reset timer
@@ -186,7 +190,7 @@
 	if(..())
 		return
 	interact(user)
-		
+
 /obj/machinery/door_timer/interact(mob/user)
 	// Used for the 'time left' display
 	var/second = round(timeleft() % 60)
diff --git a/code/game/objects/effects/anomalies.dm b/code/game/objects/effects/anomalies.dm
index 434fec620b8..89baf450720 100644
--- a/code/game/objects/effects/anomalies.dm
+++ b/code/game/objects/effects/anomalies.dm
@@ -19,8 +19,9 @@
 	var/new_frequency = sanitize_frequency(rand(PUBLIC_LOW_FREQ, PUBLIC_HIGH_FREQ))
 	aSignal.set_frequency(new_frequency)
 	poi_list |= src
-	
+
 /obj/effect/anomaly/Destroy()
+	QDEL_NULL(aSignal)
 	poi_list.Remove(src)
 	return ..()
 
diff --git a/code/game/objects/effects/decals/cleanable.dm b/code/game/objects/effects/decals/cleanable.dm
index 48a85e7e704..cfde9ab55a4 100644
--- a/code/game/objects/effects/decals/cleanable.dm
+++ b/code/game/objects/effects/decals/cleanable.dm
@@ -1,9 +1,8 @@
 /obj/effect/decal/cleanable
 	var/list/random_icon_states = list()
-	var/targeted_by = null			// Used so cleanbots can't claim a mess.
 	var/noscoop = 0   //if it has this, don't let it be scooped up
 	var/noclear = 0    //if it has this, don't delete it when its' scooped up
-	
+
 /obj/effect/decal/cleanable/proc/can_bloodcrawl_in()
 	return FALSE
 
diff --git a/code/game/objects/effects/spiders.dm b/code/game/objects/effects/spiders.dm
index 8ed8d045de4..0a9f49cd2d0 100644
--- a/code/game/objects/effects/spiders.dm
+++ b/code/game/objects/effects/spiders.dm
@@ -6,6 +6,11 @@
 	anchored = 1
 	density = 0
 	var/health = 15
+	var/master_commander = null
+
+/obj/structure/spider/Destroy()
+	master_commander = null
+	return ..()
 
 //similar to weeds, but only barfed out by nurses manually
 /obj/structure/spider/ex_act(severity)
@@ -78,7 +83,6 @@
 	var/amount_grown = 0
 	var/player_spiders = 0
 	var/faction = list()
-	var/master_commander = null
 
 /obj/structure/spider/eggcluster/New()
 	pixel_x = rand(3,-3)
@@ -110,7 +114,6 @@
 	var/travelling_in_vent = 0
 	var/player_spiders = 0
 	var/faction = list()
-	var/master_commander = null
 	var/selecting_player = 0
 
 /obj/structure/spider/spiderling/New()
@@ -118,6 +121,10 @@
 	pixel_y = rand(6,-6)
 	processing_objects.Add(src)
 
+/obj/structure/spider/spiderling/Destroy()
+	entry_vent = null
+	return ..()
+
 /obj/structure/spider/spiderling/Bump(atom/user)
 	if(istype(user, /obj/structure/table))
 		src.loc = user.loc
diff --git a/code/game/objects/items/devices/radio/headset.dm b/code/game/objects/items/devices/radio/headset.dm
index 30e02824cd1..9fd1e40b4f7 100644
--- a/code/game/objects/items/devices/radio/headset.dm
+++ b/code/game/objects/items/devices/radio/headset.dm
@@ -32,12 +32,8 @@
 	recalculateChannels(1)
 
 /obj/item/device/radio/headset/Destroy()
-	if(keyslot1)
-		qdel(keyslot1)
-	if(keyslot2)
-		qdel(keyslot2)
-	keyslot1 = null
-	keyslot2 = null
+	QDEL_NULL(keyslot1)
+	QDEL_NULL(keyslot2)
 	return ..()
 
 /obj/item/device/radio/headset/list_channels(var/mob/user)
@@ -63,7 +59,7 @@
 		return RADIO_CONNECTION_FAIL
 
 	return ..()
-	
+
 /obj/item/device/radio/headset/is_listening()
 	if(ishuman(loc))
 		var/mob/living/carbon/human/H = loc
@@ -71,7 +67,7 @@
 			return ..()
 	else if(isanimal(loc) || isAI(loc))
 		return ..()
-	
+
 	return FALSE
 
 /obj/item/device/radio/headset/alt
diff --git a/code/game/objects/items/devices/radio/radio.dm b/code/game/objects/items/devices/radio/radio.dm
index 429ef47970a..05bce7ad51c 100644
--- a/code/game/objects/items/devices/radio/radio.dm
+++ b/code/game/objects/items/devices/radio/radio.dm
@@ -30,7 +30,6 @@ var/global/list/default_medbay_channels = list(
 	var/frequency = PUB_FREQ //common chat
 	var/traitor_frequency = 0 //tune to frequency to unlock traitor supplies
 	var/canhear_range = 3 // the range which mobs can hear this radio from
-	var/obj/item/device/radio/patch_link = null
 	var/datum/wires/radio/wires = null
 	var/b_stat = 0
 	var/broadcasting = 0
@@ -54,14 +53,14 @@ var/global/list/default_medbay_channels = list(
 
 	var/list/internal_channels
 
-/obj/item/device/radio
 	var/datum/radio_frequency/radio_connection
 	var/list/datum/radio_frequency/secure_radio_connections = new
 
-	proc/set_frequency(new_frequency)
-		radio_controller.remove_object(src, frequency)
-		frequency = new_frequency
-		radio_connection = radio_controller.add_object(src, frequency, RADIO_CHAT)
+
+/obj/item/device/radio/proc/set_frequency(new_frequency)
+	radio_controller.remove_object(src, frequency)
+	frequency = new_frequency
+	radio_connection = radio_controller.add_object(src, frequency, RADIO_CHAT)
 
 
 /obj/item/device/radio/New()
@@ -74,14 +73,13 @@ var/global/list/default_medbay_channels = list(
 	global_radios |= src
 
 /obj/item/device/radio/Destroy()
-	qdel(wires)
-	wires = null
+	QDEL_NULL(wires)
 	if(radio_controller)
 		radio_controller.remove_object(src, frequency)
 		for(var/ch_name in channels)
 			radio_controller.remove_object(src, radiochannels[ch_name])
-	patch_link = null
 	global_radios -= src
+	follow_target = null
 	return ..()
 
 
@@ -271,7 +269,7 @@ var/global/list/default_medbay_channels = list(
 /mob/living/automatedannouncer/Destroy()
 	if(lifetime_timer)
 		deltimer(lifetime_timer)
-	..()
+	return ..()
 
 /mob/living/automatedannouncer/proc/autocleanup()
 	log_runtime(EXCEPTION("An announcer somehow managed to outlive the radio! Deleting!"), src, list("Message: '[message]'"))
diff --git a/code/game/objects/items/weapons/dna_injector.dm b/code/game/objects/items/weapons/dna_injector.dm
index edf3c737787..c10872afad0 100644
--- a/code/game/objects/items/weapons/dna_injector.dm
+++ b/code/game/objects/items/weapons/dna_injector.dm
@@ -5,7 +5,7 @@
 	icon_state = "dnainjector"
 	item_state = "dnainjector"
 	var/block = 0
-	var/datum/dna2/record/buf=null
+	var/datum/dna2/record/buf = null
 	throw_speed = 3
 	throw_range = 5
 	w_class = 1
@@ -26,6 +26,10 @@
 		buf.dna.ResetSE()
 		SetValue(value)
 
+/obj/item/weapon/dnainjector/Destroy()
+	QDEL_NULL(buf)
+	return ..()
+
 /obj/item/weapon/dnainjector/proc/GetRealBlock(var/selblock)
 	if(selblock==0)
 		return block
diff --git a/code/modules/food_and_drinks/food/snacks.dm b/code/modules/food_and_drinks/food/snacks.dm
index d6148b429e0..3a079e99da4 100644
--- a/code/modules/food_and_drinks/food/snacks.dm
+++ b/code/modules/food_and_drinks/food/snacks.dm
@@ -1218,28 +1218,19 @@
 	var/monkey_type = "Monkey"
 	list_reagents = list("nutriment" = 2)
 
-/obj/item/weapon/reagent_containers/food/snacks/monkeycube/afterattack(obj/O, mob/user, proximity)
-	if(!proximity)
-		return
-	if(istype(O, /obj/structure/sink))
-		to_chat(user, "<span class='notice'>You place [src] under a stream of water...</span>")
-		user.drop_item()
-		forceMove(get_turf(O))
-		return Expand()
-	..()
-
 /obj/item/weapon/reagent_containers/food/snacks/monkeycube/water_act(volume, temperature)
 	if(volume >= 5)
 		return Expand()
 
 /obj/item/weapon/reagent_containers/food/snacks/monkeycube/wash(mob/user, atom/source)
-	if(do_after(user, 40, target = source))
-		return 1
+	user.drop_item()
+	forceMove(get_turf(source))
+	return 1
 
 /obj/item/weapon/reagent_containers/food/snacks/monkeycube/proc/Expand()
 	if(isnull(gcDestroyed))
 		visible_message("<span class='notice'>[src] expands!</span>")
-		new/mob/living/carbon/human(get_turf(src),monkey_type)
+		new/mob/living/carbon/human(get_turf(src), monkey_type)
 		qdel(src)
 
 /obj/item/weapon/reagent_containers/food/snacks/monkeycube/farwacube
diff --git a/code/modules/mob/living/simple_animal/simple_animal.dm b/code/modules/mob/living/simple_animal/simple_animal.dm
index aec9d2d0c95..7c951cebbc9 100644
--- a/code/modules/mob/living/simple_animal/simple_animal.dm
+++ b/code/modules/mob/living/simple_animal/simple_animal.dm
@@ -96,6 +96,7 @@
 	if(collar)
 		collar.forceMove(loc)
 		collar = null
+	master_commander = null
 	simple_animal_list -= src
 	return ..()
 
@@ -303,7 +304,7 @@
 
 /mob/living/simple_animal/proc/attacked_by(obj/item/I, mob/living/user) // Handled in _onclick/click.dm
 	return
-	
+
 /mob/living/simple_animal/bullet_act(var/obj/item/projectile/Proj)
 	if(!Proj)
 		return
@@ -662,15 +663,15 @@
 	. = ..()
 
 /mob/living/simple_animal/can_equip(obj/item/I, slot, disable_warning = 0)
-	// . = ..() // Do not call parent. We do not want animals using their hand slots.
-	switch(slot)
-		if(slot_collar)
-			if(collar)
-				return 0
-			if(!can_collar)
-				return 0
-			if(!istype(I, /obj/item/clothing/accessory/petcollar))
-				return 0
+	// . = ..() // Do not call parent. We do not want animals using their hand slots.
+	switch(slot)
+		if(slot_collar)
+			if(collar)
+				return 0
+			if(!can_collar)
+				return 0
+			if(!istype(I, /obj/item/clothing/accessory/petcollar))
+				return 0
 			return 1
 
 /mob/living/simple_animal/equip_to_slot(obj/item/W, slot)
@@ -692,13 +693,13 @@
 				name = collar.tagname
 				real_name = collar.tagname
 			regenerate_icons()
-
-/mob/living/simple_animal/unEquip(obj/item/I, force)
-	. = ..()
-	if(!. || !I)
-		return
-
-	if(I == collar)
+
+/mob/living/simple_animal/unEquip(obj/item/I, force)
+	. = ..()
+	if(!. || !I)
+		return
+
+	if(I == collar)
 		collar = null
 		regenerate_icons()
 
diff --git a/code/modules/recycling/disposal.dm b/code/modules/recycling/disposal.dm
index dd3856afcc4..5d02d8a93f1 100644
--- a/code/modules/recycling/disposal.dm
+++ b/code/modules/recycling/disposal.dm
@@ -500,7 +500,7 @@
 	var/hasmob = 0 //If it contains a mob
 
 	Destroy()
-		qdel(gas)
+		QDEL_NULL(gas)
 		active = 0
 		return ..()
 
diff --git a/code/modules/research/xenobiology/xenobio_camera.dm b/code/modules/research/xenobiology/xenobio_camera.dm
index 9e0e26a0252..40f20ea4dde 100644
--- a/code/modules/research/xenobiology/xenobio_camera.dm
+++ b/code/modules/research/xenobiology/xenobio_camera.dm
@@ -77,11 +77,11 @@
 	else if(istype(O, /obj/item/weapon/storage/bag))
 		var/obj/item/weapon/storage/P = O
 		var/loaded = 0
-		for(var/obj/G in P.contents)
-			if(istype(G, /obj/item/weapon/reagent_containers/food/snacks/monkeycube))
-				loaded = 1
-				monkeys++
-				qdel(G)
+		for(var/obj/item/weapon/reagent_containers/food/snacks/monkeycube/MC in P.contents)
+			loaded = 1
+			monkeys++
+			P.remove_from_storage(MC)
+			qdel(MC)
 		if(loaded)
 			to_chat(user, "<span class='notice'>You fill [src] with the monkey cubes stored in [O]. [src] now has [monkeys] monkey cubes stored.</span>")
 		return