I know I had spider mites a couple years back(this is my 1st grow in years) but i was just young and lazy then...I actually dont even wear shoes in the grow room & i try to be very aware of what im wearing(usually change or go in just boxers).but it think the biggest difference is cleaning on a regular basis. I also sprayed the outside of my room w/ some doc doom spidermite spray(lines,corners)....not this time! lol