These are most likely demodex. The previous replies gave great tips. They are incredibly hard to eradicate, but if you feel them moving they are mating on the surface and not hiding in follicle. Get a half gallon jug and add 32 oz of distilled water and a cup of borax at least. Put enough borax to over-saturate/not dissolve any more, then add 16 oz of H2O2 (Hydrogen-Peroxid) 3% and shake well. After showering, pour the mixture slowly over head, scalp, torso and extremities, Do NOT dry off with towel or anything but moving air. Leave it on a good while to soak into skin and scalp. The peroxide is necessary for a catalyst to skin absorption. ACV or liquid MSM work in a similar fashion if you don't want the peroxide. This method works great for animals also(fleas, mange, ticks or mites). Do this every 3 days until you are mostly clear, then every 10 days for maintenance. It's cheap and effective so stick with it. If you sit in the dark for 5 min. before starting(after 12pm preferrably) they will come out of hiding and be easier to nuke. Good luck and happy hunting!--KB.