Somehow the subject with my 15 year old was of sanitation when drying hands. But when I was younger, I remember when a lot of places would have this mechanism with a captive cloth towel that was pulled down. I don't know exactly what it was supposed to do when it recirculated, but I would hope that it would somehow dry it some way. What I remember most about them was that they were often wet. I'm sure that they were supposed to be serviced regularly, but a wet towel would seem to be a breeding ground for assorted stuff.