Well now that you said that ..to me then i would think it must be mites...i am experimenting also with drinking 1/4 tspn of borax in 1 liter of water as it says to no more than that of course ..and it said to keep up with it for about 1 month ...to see results...as they are very hard to get rid of ..you can find the info on earthclinic.com if you havent tried this one yet.