Unforgiven

Erm, testing for a hot fuse with a drop of water is the accepted way actually.

I have a 2001 MK2 2.3 Ghia Auto and replaced the fuse box by the battery and alternator wire due to the alternator fuse getting too hot. I checked the fuses with water after fitting the new box and find that the 110amp fuse next to the alternator fuse is also getting very hot, can anyone tell me what this fuse does and any idea what would be causing it to get too hot?