three days sounds like the glove box light. But it could be other things and you will need a multimeter to check it out.

For the glove box, the door tends to warp just enough so that it latches but the plunger for the switch doesn't get pushed in enough. I used a penny glued to the lid. Substitute a sticky backed piece of felt, like for a chair leg, for the penny.

The realistic way is to do as B.B. instructed, pulling one fuse at a time and waiting for the voltage use to drop. That narrows it down to a single circuit and only a few things to check.

Oh, a dark garage is much easier to find light leaks.

If you park indoors, a battery 'minder' or trickle charger works great.
--
My back feels better when I sit in a Volvo seat