The size is good, and I defrost them in room temperature water. The warm side is about 85-92 and cold side is usually 76-82, humidity is 55-60%. They both eat adult mice, follwing this chart:
the only things i can say based on your info is that you have a big swing for your warm side, and 76° is pretty low for a cold side temp IMO (but not bad, i just try to keep mine at 79-81°). what're you using for heat? and how is it regulated?