not sure about worms.
as for the rest of Q, if you live in dry climate like me just a fogger controlled on hydrotherm is not enough. as DV said cover part of the top of the tank to keep humidity in. I need to flood substrate once a week, more in a winter and now when i got fancy pressure spray bottle, using it
hydrotherm works the way it needs to be, you have plugged a fogger in, so once a sensor gets lower humidity then needed it turns the fogger on, and turns off when humidity is a bit over, you don't need to worry about it. I programmed 76% on mine for pacs.
make sure your sensor is not where the fog comes from directly![]()