It is starting to get cold here in new york, and im worried about my BP's temp. The hot side (with a UTH) is dropping to low 70's at night because i have to turn the heat lamp off. I have put tinfoil over the top and i haven't found any other solutions to my problem. I have put another layer of foil as well as a folded up bedsheet in hopes of insulation, but the temps. still drop. Besides a CHE or infrared bulb (which by me are not readily available) what can i do to raise the temps. at night?