I'm dealing with condensation issues of my own w/my Sanyo 4912 conversion. I'm wondering if the extreme condensation means there is a poor seal on the door (or in your case the lid). I'd like to cure the problem vs. mopping/sopping the result...
There is some stuff that is a moisture absorbant, sold in West Marine and other boat supply type places, might help your situation, not sure if it's economical, though.
Primary - California Common -finally!
Secondary - nothing, back after year plus hiatus
Keg carbing & conditioning - nada
Drinking - store bought: Loose Cannon IPA, Wachusett IPA.
On deck: Trying to decide (beer); wine kit likely (red wine)