go to the dollar store and buy damp rid... buy the kind with the little buckets... (only $2-$3 a bucket) and sit them out.. when they are half full of water, replace.. also keep ac running to help.
Although I don't FT, I keep my TT plugged in and AC on mid 80's with several of the damp rid buckets in it. I have not had problems with mold. Keeping the air circulating is critical along with moisture capture. and yes, we have high humidity and high temps.. it was 99 degrees here yesterday with humidity enough to make heat index be 108