Kathy you must live near a nuclear power plant and have some sort of mutated critters
Do you remember the brand(s) of DE you've tried? Could it be the difference between the food grade and agricultural grade?
DE has worked wonderfully for me for years in the garden and it was no less effective at killing the red mites that were in the floor of the coop. The floor of my breeding pens are above waist level so it's easy to see any bugs crawling around in the shavings. When I noticed that the little nasties were mites I decided to sprinkle some DE in the nest boxes and directly on top of the shavings. The next day the mites were still there but mostly dead. The ones that were still moving most definitely weren't moving as fast as the day before. I assume they were either already cut up from the DE and in the process of drying out or they possibly realized that there was no way off the little piece of pine shaving they were clinging to
I'm the "see it to believe it" type and I have no doubts about the effectiveness of DE ... except on squash bugs

DE has worked wonderfully for me for years in the garden and it was no less effective at killing the red mites that were in the floor of the coop. The floor of my breeding pens are above waist level so it's easy to see any bugs crawling around in the shavings. When I noticed that the little nasties were mites I decided to sprinkle some DE in the nest boxes and directly on top of the shavings. The next day the mites were still there but mostly dead. The ones that were still moving most definitely weren't moving as fast as the day before. I assume they were either already cut up from the DE and in the process of drying out or they possibly realized that there was no way off the little piece of pine shaving they were clinging to

I'm the "see it to believe it" type and I have no doubts about the effectiveness of DE ... except on squash bugs
