After prolonged use, residue and filmy deposits may build up inside the Sludge Judge. The Sludge Judge Cleaning Brush used with a mild detergent and warm water will help break up these materials and keep the unit clear so accurate sludge readings can be taken.
It is made of galvanized steel wire and polyester bristles. Disassemble the unit and clean each section separately. Use for Sludge Judge and Sludge JudgeUltra. 6 ft. x 1" (1.83 m x 2.54 cm) diameter bristle.