Interior lights won't go out when the door is closed

Try spraying some WD40 into the door latches.

'94 Olds Ciera dome switch is integrated with the seatbelts. This was the first result in google search so it's the one I chose to post to. Dome light stayed on when car off and drained my battery. I was puzzling over where the front door plunger-type switch was (like on every car I've owned). Hint: Don't waste your time looking! The back doors have them, the front doors it's integrated with the upper part of the seat belt where connected to frame. I pulled it out 6 inches (like when you're putting it on) and let it go and retract. It went out! Yes, a very stupid system, and a project for later, but check this first *before you do anything else*.