After doing the foil thing, and trying to go without a heat lamp today, I've found out that humidity and a pretty steady temp will happen if you take a decently moist towel (not dripping or anything, but wet) and drape it over about two thirds of the tank. keeps my humidity from 65 to 72%. If its too humid, knock it back an inch or two. Works amazingly well, in my opinion.

P.S. Pickles is shedding, thats why the humidity is a little high.