500PSI Mask Scrub

500psi Mask Scrub helps keep the lens clean and free of buildup of sediment both on the inside and the outside of the lens. It should be used initially on new lenses to remove the mold release that the mask manufacturers leave on the lens during the manufacturing process and then periodically afterwards to keep the lens clean from sediment and buildup of defog film over repeated uses. It also should be used anytime you are not using the same defog that you had been previously using as some defoggers are not compatible with each other and can leave a haze on the lens. 
Also gently removes residue build-up in older masks.