Geo Method

For some reason that absolutely escapes me Calgon is difficult to find in my neck of the woods. A perfect substitute is 20 Mule Team Borax, sometimes called washing soda. It makes the inside of the tank as slippery as a greased piglet. I have only found it in the dry format but I simply mix it with a gallon or so of warm water, add the detergent and dump in the black tank. A table spoon in a foot bath softens up the feet real well.