Use Ever-Clean Tabs and eliminate most of the extra maintenance problems such as odors, overflows and water damage caused by plugging condensate drains and pans. Ever-Clean Tabs are easy to use, completely soluble, do not form any deposits in the pan or drain, and are safe, non-toxic, and non-corrosive. Ever-Clean Tabs clean sludge, scum and other accumulations in condensate drain pans preventing the odors caused by these accumulations.