Help! Slow Battery Discharge

unless you go to every part with a multimeter?? I try and do the sometimes simple thing- takes time though. Disconnect things one at a time. Put a multimeter on your battery to see current draws. read your meter, disconnect alt. Do over and over for starter, ign switch, etc. If it takes 2 weeks to kill your battery- its low draw- something like a trunk light, door jamb switch, hood light, radio memory, etc.
Some cars were known to come from factory with dead batteries because their trunk/hood light was on because car was trucked at an angle for mercury?? style switches to think lid was open- even though they werent. So even though you dont have that type switch- it still may be a bad switch or bad ground.
Reclean all grounds. Ive even seen a somewhat clean battery post cause a drain.
If all else fails- install a battery disconnect switch inside car under seat or just disconnect battery when not using.