I use running water, twice filtered down to 1 micron, mounted on a special order high speed Vinyl Stack. Then thrice filtered running water, filtered down to 0.5 microns. Then a bath in distilled water. It takes 50 or 75 records to show any hint of detergent contamination, which is when I change it (use the discarded rinse for cleaning).
This would not work, except that my tap water is almost indistinguishable from distilled.
This would not work, except that my tap water is almost indistinguishable from distilled.