The mites appear to be gone! I checked some samples under a magnifying lens and saw nothing that was moving. I dumped the contents into a tub and washed the tray, then restored the worms to their tray with some baby carrots. I checked again an hour later to see if there were any mites on the carrots. None.
So now we know how to get rid of grain mites in meal worm trays : starve the mites of moisture by drying out the bedding. The worms appeared to survive, at least the large, visible ones. And they sure were thirsty! The carrots were host to many worms in no time after being put into their tray!
Thanks for the help, Jchny!
awesome news!!!
