I couldn't really tell from the pics, but what temp readings are you getting on the cool side and the hottest part of the warm end?
I have a digital probe thermometer - my hot sides measures about 94, my cool about 82 and the ambient temp is usually 74-78. That is glad press and seal on top (It looks kind of silly) but I have that covering 1/2 - 2/3 the top and my humidity stays right about 55-62%.
-Stacey
1.0 Ball Python... Stanley (gotta start somewhere..)
0.3 Mice .... Maui, Mango and Mai Tai, aka Satan's spawn
1.0 Bunny Rabbit... William, aka Bill the Bunny, aka Bill-Bo