I girl I used to know who trained as a beauty therapist wiped feet every day with surgical spirit(think you buy in the chemist). I had a wee search on the net to see if I could find anymore info and someone does suggest you do this every day and stop if you get any irritation. I would have thought it could dry the skin a bit that maybe you could try doing it every 2nd day or something? She just put it on some cotton wool and rubbed over feet, concentrating on soles and between toes.