Pour Vinegar in the part you add water. ÝUse at least one Cup. (I use about 1/2 a pot.) ÝThen run 2 or 3 pots of water through your machine to remove the Vinegar. ÝLime Away works but it is more expensive. ÝThen after the Vinegar has run through throw it down your sink and add Baking Soda (Put in before the Vinegar). ÝWhen it stops foaming. Pour or run very hot water down the sink. ÝThis clears the drain. ÝTwo uses for the price of one! That’s frugal.