Chicken laying mash will mold if not properly applied. Very thin (sprinkled) on top. The laying mash should be moist when applied.
It will be consumed quickly, but if it is applied too thick, it will mold. Worms on the sides is not a problem. I'd lower the temp setting to about
50* so the possibility of freezing is minimized. Heat will encourage mold and condensation. Worms are hardy and while the European Night
Crawlers are more temperamental about heat, they will survive well. For a while you have products in the bedding that will generate some heat.
In a month, they should have most of the edible products in the bedding consumed. The worm castings will be concentrated on or near the bottom
of the bed. How much room at the top of the bedding do you have from the lid? Sounds like your cranked up and doing well.