diff --git a/code/game/objects/items/weapons/cards_ids.dm b/code/game/objects/items/weapons/cards_ids.dm
index e8c211306d6..7465b4c965d 100644
--- a/code/game/objects/items/weapons/cards_ids.dm
+++ b/code/game/objects/items/weapons/cards_ids.dm
@@ -158,6 +158,7 @@
 
 /obj/item/card/id/Destroy()
 	QDEL_NULL(chat_user)
+	mob_id = null
 	. = ..()
 	GC_TEMPORARY_HARDDEL
 
diff --git a/code/game/objects/items/weapons/ecigs.dm b/code/game/objects/items/weapons/ecigs.dm
index 713c74d8094..bd5b6dd0394 100644
--- a/code/game/objects/items/weapons/ecigs.dm
+++ b/code/game/objects/items/weapons/ecigs.dm
@@ -52,6 +52,11 @@
 		cig_cell = new cell_type(src)
 	ec_cartridge = new cartridge_type(src)
 
+/obj/item/clothing/mask/smokable/ecig/Destroy()
+	QDEL_NULL(ec_cartridge)
+	QDEL_NULL(cig_cell)
+	return ..()
+
 /obj/item/clothing/mask/smokable/ecig/get_cell()
 	return cig_cell
 
diff --git a/code/game/objects/items/weapons/grenades/chem_grenade.dm b/code/game/objects/items/weapons/grenades/chem_grenade.dm
index 40a46d4d8d7..b9549e1d023 100644
--- a/code/game/objects/items/weapons/grenades/chem_grenade.dm
+++ b/code/game/objects/items/weapons/grenades/chem_grenade.dm
@@ -11,7 +11,7 @@
 	var/state = 0
 	var/path = 0
 	var/obj/item/device/assembly_holder/detonator = null
-	var/list/beakers = new/list()
+	var/list/beakers = list()
 	var/list/allowed_containers = list(/obj/item/reagent_containers/glass/beaker, /obj/item/reagent_containers/glass/bottle)
 	var/affected_area = 3
 
@@ -26,6 +26,13 @@
 	. = ..()
 	create_reagents(1000)
 
+/obj/item/grenade/chem_grenade/Destroy()
+	for(var/obj/item/beaker in beakers)
+		qdel(beaker)
+	beakers.Cut()
+	QDEL_NULL(detonator)
+	return ..()
+
 /obj/item/grenade/chem_grenade/attack_self(mob/user as mob)
 	if(!stage || stage==1)
 		if(detonator)
diff --git a/code/modules/clothing/under/accessories/storage.dm b/code/modules/clothing/under/accessories/storage.dm
index 47773985549..32f8609b41c 100644
--- a/code/modules/clothing/under/accessories/storage.dm
+++ b/code/modules/clothing/under/accessories/storage.dm
@@ -14,6 +14,10 @@
 	hold.max_storage_space = DEFAULT_BOX_STORAGE
 	hold.max_w_class = WEIGHT_CLASS_SMALL
 
+/obj/item/clothing/accessory/storage/Destroy()
+	QDEL_NULL(hold)
+	return ..()
+
 /obj/item/clothing/accessory/storage/attack_hand(mob/user as mob)
 	if (has_suit)	//if we are part of a suit
 		hold.open(user)
diff --git a/code/modules/events/carp_migration.dm b/code/modules/events/carp_migration.dm
index a6c36c43575..cbebeb3311d 100644
--- a/code/modules/events/carp_migration.dm
+++ b/code/modules/events/carp_migration.dm
@@ -100,7 +100,8 @@
 		var/datum/weakref/carp_weakref = carp_ref
 		var/mob/living/simple_animal/hostile/carp/fish = carp_weakref.resolve()
 		if (fish && prob(50) && is_type_in_typecache(fish.loc, despawn_turfs))
-			qdel(fish)
+			spawned_carp -= carp_weakref
+			qdel(carp_weakref)
 
 /datum/event/carp_migration/cozmo/start()
 	..()
diff --git a/code/modules/mob/living/carbon/brain/brain.dm b/code/modules/mob/living/carbon/brain/brain.dm
index fff0ffd9dff..1baed537051 100644
--- a/code/modules/mob/living/carbon/brain/brain.dm
+++ b/code/modules/mob/living/carbon/brain/brain.dm
@@ -21,7 +21,7 @@
 			death(1)	//Brains can die again. AND THEY SHOULD AHA HA HA HA HA HA
 		ghostize()		//Ghostize checks for key so nothing else is necessary.
 	container = null
-	. = ..()
+	return ..()
 
 /mob/living/carbon/brain/IsAdvancedToolUser() // to be able to use weapons when piloting a hardsuit
 	return TRUE
diff --git a/code/modules/mob/living/carbon/human/human_species.dm b/code/modules/mob/living/carbon/human/human_species.dm
index e4fa81b84bc..5c5c5a83083 100644
--- a/code/modules/mob/living/carbon/human/human_species.dm
+++ b/code/modules/mob/living/carbon/human/human_species.dm
@@ -19,7 +19,7 @@ INITIALIZE_IMMEDIATE(/mob/living/carbon/human/dummy/mannequin)
 
 /mob/living/carbon/human/dummy/mannequin/Destroy()
 	SSmobs.free_mannequin(src)
-	. = ..()
+	return ..()
 
 /mob/living/carbon/human/vatgrown/Initialize(mapload)
 	. = ..(mapload, SPECIES_HUMAN_VATGROWN)
diff --git a/code/modules/mob/living/carbon/slime/slime.dm b/code/modules/mob/living/carbon/slime/slime.dm
index 1a7b9f65b32..edc7ff39bc1 100644
--- a/code/modules/mob/living/carbon/slime/slime.dm
+++ b/code/modules/mob/living/carbon/slime/slime.dm
@@ -66,9 +66,6 @@
 	var/toxloss = 0
 	var/datum/reagents/metabolism/ingested
 
-/mob/living/carbon/slime/get_ingested_reagents()
-	return ingested
-
 /mob/living/carbon/slime/Initialize(mapload, colour = "grey")
 	. = ..()
 
@@ -90,6 +87,19 @@
 	last_AI = world.time
 	regenerate_icons()
 
+/mob/living/carbon/slime/Destroy()
+	victim = null
+	target = null
+	leader = null
+	for(var/mob/friend in friends)
+		friends -= friend
+	friends.Cut()
+	QDEL_NULL(ingested)
+	return ..()
+
+/mob/living/carbon/slime/get_ingested_reagents()
+	return ingested
+
 /mob/living/carbon/slime/purple/Initialize(mapload, colour = "purple")
 	. = ..()
 
diff --git a/code/modules/overmap/exoplanets/exoplanet.dm b/code/modules/overmap/exoplanets/exoplanet.dm
index 7d91d275c00..97dc3bf0291 100644
--- a/code/modules/overmap/exoplanets/exoplanet.dm
+++ b/code/modules/overmap/exoplanets/exoplanet.dm
@@ -265,7 +265,6 @@
 					var/mob_type = pick(repopulate_types)
 					var/mob/S = new mob_type(T)
 					animals += S
-					GLOB.death_event.register(S, src, PROC_REF(remove_animal))
 					RegisterSignal(S, COMSIG_QDELETING, PROC_REF(remove_animal))
 					adapt_animal(S)
 			if(animals.len >= max_animal_count)
@@ -287,7 +286,6 @@
 
 /obj/effect/overmap/visitable/sector/exoplanet/proc/remove_animal(mob/M)
 	animals -= M
-	GLOB.death_event.unregister(M, src)
 	UnregisterSignal(M, COMSIG_QDELETING)
 	repopulate_types |= M.type
 
diff --git a/code/modules/reagents/reagent_containers/food/drinks/flask.dm b/code/modules/reagents/reagent_containers/food/drinks/flask.dm
index fe95153f27d..a89ca3d7aa8 100644
--- a/code/modules/reagents/reagent_containers/food/drinks/flask.dm
+++ b/code/modules/reagents/reagent_containers/food/drinks/flask.dm
@@ -35,6 +35,10 @@
 	atom_flags ^= ATOM_FLAG_OPEN_CONTAINER
 	update_icon()
 
+/obj/item/reagent_containers/food/drinks/flask/vacuumflask/Destroy()
+	QDEL_NULL(cup)
+	return ..()
+
 /obj/item/reagent_containers/food/drinks/flask/vacuumflask/attack_self(mob/user)
 	if(cup)
 		to_chat(user, SPAN_NOTICE("You remove \the [src]'s cap."))