Couple of little silica get**Gel** packets will soak up any moisture in the case
but if you really want to go mad
size up a watercooling loop, then bore out/ dig a 4 foot hole in the yard, should be nice and cool down there, have a 5 gallon reservoir in there to run your water through.
oh, and use quick connect fitments so you can remove the Pc easily to drain or attach a more orthodox radiator
Moto