Ugh! How frustrating! I use mite powder between 2 paper towels to line the shelves. I don't want the powder to actually come in contact with the cultures. I'm sure it could be harmful to the frogs. I also keep a citronella candle near. I've gotten a few mites but nothing like in the past. I also moved them up higher in the shelves.

Neat idea! I'll be interested to see how the tape works . Will you update after some time to let us know?