Hey joe, if you see no mites, what makes you think the strips didn't work?

All of my mites were dead overnight, then within about 2 days all the babies that tried to hatch were dead as well, half out of the egg. It was in a 3'x3'x9' space. You just need to keep using the strip until you see no more mites coming out of eggs, and no fresh eggs, and of course no mites.