 but it's really a matter of stopping the odor. Because once we get something in that trap, the odor stops, as you've already found out. So if it's really not being used, one of the suggestions I have is don't use water at all. You can use like mineral oil that you can get at a drugstore. It doesn't take any more than six to eight ounces, pour it down the drain, and that mineral oil doesn't evaporate.