Spent wick
Burnt down to the knot. Nothing will ever light it again.
Vendor trash. Nothing in the game wants it: no recipe, no enchant, nothing to wear. Stacks in one inventory slot. Vendors pay 10 coins for it.
What drops it
Corpse candle
1 in 5
Rolled on its own rather than from the loot table, so it takes nothing away from anything else that falls off it.
What it trades for
No trades in the last 30 days.