IPA is a very versatile surface cleaning product. As a company we prefer IPA over specific degreasers, not only is it cheaper but due to its pure composition it does not leave behind a greasy residue that can affect the adherence of non slip stair treads. We recommend using a clean dry cloth then wiping in one direction on the surface, the reason why we prefer this to simply wiping in a windshield wiper motion is that the IPA will not destroy contaminants it simply lifts them and deposits them elsewhere so a simply one direction wipe will mean that they are left where you lift the cloth off. Supplied in a 34 fluid ounce container.