You may want to invest in a UPS for your incubator. I have 2 UPS's. One is running the incubators and the other is fully charged incase the electric goes off long enough to drain the first one.
They are really not that expensive when consider the cost of losing a couple of hundred eggs.
Are you on a well. I had problems similar when using well water that I am just getting over. We made a new laundry room in the basement and I started using the well water for my reptiles. I had a few Geckos that became really skinny and 1 died until I realized what happened. Changed back to...
Try using vermiculite. I tried perlite with the same result. I have no idea what i was doing wrong but once I switched all was ok. Lots of people use perlite without a problem, but I was not one of them.
I use at about a 1000 a month. As i said they are cheaper than crickets for me.
My beardies will eat these till they bust, but they will eat everything until they bust.
If you put them in the refrigerator, put them inside a styrofoem cooler of some sort. You frig is probably around 4 or 5 degrees C, the optimium temp to store waxworms at is 9C. Too cool and they will turn black on you and die. You do not need to feed waxworms, they will be fine for the duration...