Pre-cleaning & degreasing treatment for new dive masks and slate cleaner. Innovative treatment which carefully removes the silicone residue deposited on the new mask lenses during production process. Pre-cleaning lenses of a new dive mask is a necessary action to take before any application of anti-fog liquids as it allows them to work more effectively while ensuring a clear and sure visibility underwater. It can be used also to gently clean dive slates. Specific solution for use on glass. It does not damage the plastic parts of the mask. With sponge applicator.