SmartClean is residue remover and de-scaler to be used with SmartStill distiller. SmartClean is a special cleaner compound optimized for removing both limescale (which will build up during distillations) and other solid matter (the other impurities) without the need for brushes or other methods which can damage the surface of the boiling chamber. Fill your SmartStill with hot water, add the contents of one SmartClean sachet. Turn the still on and let it get to the point where it just starts to boil. Then unplug and leave to cool down as usual. Rinse out and it is ready to go again.