Two questions: I'm using a ZooMed Reptibator and I've got the eggs in two 6-quart tubs on Hatchrite with two tiny holes in each tub and press and seal on both. The problem is I can't see the eggs through the top now and can't keep visual track of any potential problems. How often can I safely open the whole thing up without causing things to fluctuate too much? I had temps at 88-89, but they dropped for the few minutes I had it open while setting the eggs up.

Second question: Should I trust my cheap little thermometer? This is what it was reading after I got the eggs in there and the temps started climbing again. They're also climbing very slowly.

Fretful newbie here