Step 3: The base for all of the other Audio Intelligent Vinyl Solution, Ultra Pure Water is the most effective as a final rinse after steps one and two. Even with machine cleaning, and especially with hand cleaning, there is a possibility of some contaminant residue (not fluid residue!) remaining after the cleaning steps one and two. Ultra-Pure Water provides an additional cleaning cycle to remove any contaminant that may remain on the record surface. This product, which is also extremely effective as a rinse for brushes and pick up tubes, is filtered to an exceptionally pure state and has the correct pH for maximum effectiveness. This product is also the basis for all of the Audio Intelligent Vinyl Solutions record cleaning formulas.