The Electrode Gel ensures a safe passage of the electrodes to the body and should be applied with every use. To apply, put a small amount on each of the four-carbon electrode pads, and spread the gel around the entire pad with your finger. The glob should be no bigger than a pea. If you feel the need to apply more gel at any time, stop the use of the belt and reapply more gel to each of the four-carbon electrodes. The gel should be wiped off after each daily use with gentle PH water or plain water. No chemicals should be used to clean your kessela Belt. Electrode Gel is only required when using the Boost Settings. No gel is needed when using the Red Light Mode only.