I have my tanks insulated and covered, and I put a slab of it in front of tnak after lights out. The only other question I have is this: There are only grounded/three pronge outlets in kitchen and bathroom. The sockets that I'm using are only for two-pronge plugs, so I have a 'cheater' to turn a two pronge socket into a three, even though there's actually no ground. Could this be making the difference? (Husband was going to change them into grounded three pronge shrtly after we moved here, but then realized it was not possible from inside of wall sockets, because there was no 'ground wire'. Then I found these 'cheater' plug'ins at the $1 store, so that's what I use. Otherwise I wouldn't even be able to watch television in there!