Several essential oils have anti-fungal properties and could be used by you or your MIL in a variety of ways - washing up, diffused in the room, used in the washing machine rinse for clothes or sheets, etc. Lavender and tea tree oil are two easily available oils that come to mind. I suggest an aromatherapy book from the library or bookstore and a trip to the natural foods store. I found Valerie Ann Worwood's book, "The Complete Guide to Essentail Oils & Aromatherapy" more precise than others I read. Like any medicine, essential oils should be used with knowledge. Sharon Starkston, LLLL, Hinsdale, Illinois, USA [log in to unmask]