A couple of years back I decided to transplant my A1200 from it's brown disintergrating commodore case into a brand new Amiga Technologies A1200 case (from a guy who had towered his Amiga). Upon removing my A1200 Mobo, I noticed that the whole interior was covered in very sticky, smelly hot chocolate residue... (I litterly had to chip the Mobo away from the bottom of the case!!!)
When I was younger I used to pop a mug of Hot Chocolate on top of the Vents all the time, I obviously used to spill a bit, but not much... over the course of around 7 years apparently quite a lot of hot chocolate, tea and coffee had made its way inside my A1200... I decided to not clean the mobo, as it is working fine and I really don't want to upset anything..