The solvents which are often used to erase marks on glasses are potentially harmful when they get in contact with skin, or when inhaled. So Clean enables you to erase the marks on glasses without the risk of contact with solvents. Thanks to its special tip, you will only use a small quantity of solvent, hence limiting any risk of inhalation. Fill the cartridge with your usual solvent, soak the tip by repeatedly pressing it on the glasses, then erase the marks by lightly scrubbing the surface.
(Sold empty)