The main reason not to replace a diaphragm every time that yeast is suspected is the cost, approx. $35 each, and insurance doesn't cover birth control devices. In addition, it may require an additional office visit, for fitting, if the M.D. won't write the prescription for the diaphragm without a visit. This additional visit could, presumeably, be covered at least in part by insurance, because it would be for treatment of yeast. It would be very useful to know if there is some way to disinfect the diaphragm without damaging it. I keep meaning to try to contact the manufacturer, but never remember while I can make the call. Margaret K.K. Radcliffe [log in to unmask] Dept. of Mining & Minerals Engr. Virginia Tech, Blacksburg, VA