There is a big difference in eggs being exposed to humidity and being exposed to moisture. Condensation dripping on eggs or substrate being soggy wet will cause problems. Substrate should clump up when squeezed but you should not be able to squeeze water out of it. Temps can vary a little too...86-90*. Eggs will take longer to hatch at 86* and will hatch sooner at 90*. Personally I incubate at 89-90*