Pass 3

code/game/objects/items/devices/guitar.dm

@@ -16,7 +16,7 @@
 	song.instrumentExt = "ogg"
 
 /obj/item/device/guitar/Destroy()
-	del(song)
+	qdel(song)
 	song = null
 	return ..()
 

code/game/objects/items/devices/violin.dm

@@ -15,7 +15,7 @@
 	song.instrumentExt = "ogg"
 
 /obj/item/device/violin/Destroy()
-	del(song)
+	qdel(song)
 	song = null
 	return ..()
 

code/game/objects/items/weapons/cigs.dm

@@ -37,8 +37,8 @@ LIGHTERS ARE IN LIGHTERS.DM
 	create_reagents(chem_volume) // making the cigarrete a chemical holder with a maximum volume of 30
 
 /obj/item/clothing/mask/cigarette/Destroy()
-	. = ..()
-	del(reagents)
+	qdel(reagents)
+	return ..()
 
 /obj/item/clothing/mask/cigarette/attackby(obj/item/weapon/W as obj, mob/user as mob, params)
 	..()

code/game/objects/items/weapons/defib.dm

@@ -165,7 +165,12 @@
 	if(on)
 		var/M = get(paddles, /mob)
 		remove_paddles(M)
-	update_icon()
+	if(paddles)
+		qdel(paddles)
+		paddles = null
+	if(bcell)
+		qdel(bcell)
+		bcell = null
 	return ..()
 
 /obj/item/weapon/defibrillator/proc/deductcharge(var/chrgdeductamt)

code/game/objects/items/weapons/storage/fancy.dm

@@ -182,7 +182,7 @@
 
 
 /obj/item/weapon/storage/fancy/cigarettes/Destroy()
-	del(reagents)
+	qdel(reagents)
 	return ..()
 
 

code/game/objects/items/weapons/tanks/tanks.dm

@@ -33,7 +33,7 @@
 
 /obj/item/weapon/tank/Destroy()
 	if(air_contents)
-		del(air_contents)
+		qdel(air_contents)
 
 	processing_objects.Remove(src)
 

code/game/objects/structures/musician.dm

@@ -318,7 +318,7 @@
 		icon_state = "piano"
 
 /obj/structure/piano/Destroy()
-	del(song)
+	qdel(song)
 	song = null
 	return ..()