RELAX WIZWISE!
Seriously. You seem to panic a lot.
1. If you have a gradient, the temps you mentioned are 100% FINE.
2. 69 May be too cold for Mousekilla, but for a cool side, its FINE. My house hovers between 70-76.
3. With a proper gradient 90 is perfectly fine. Lower the hot spot if you think it's too hot. Around 84 is just fine and will save you electricity.
Just relax.
![Smilie](http://www.ssnakess.com/forums/images/smilies/smile.gif)
Stop moving your cornsnake to where YOU think he should be. If he has acess to temps ranging from 70-90 then HE will choose where he wants to be. You placing him where YOU think he should be goes against all the things that have evolved to make them thermoregulate. If he has acess to the range in temps, he can make his own choice perfectly fine without human help.
Marisa