I did a complete cage reset. Anything I thought could survive a dishwasher (no dish soap though) I ran through. The booster heater in there should bump the temp to at least 160 F Hopefully that killed any wood mites and/or their eggs.

Most other things were plastic and fabric (fake plants) and I suspect those are not wood mite suitable. But I really don't know.

I also did a complete substrate change for every tank.

We'll see what happens.