Ultrasonic cleaning

Same here, ultrasonic cleaning, distilled water with tergikleen, 20 drops to the gallon.

I use a Klaudio machine and add three drops of Kodak Photoflo to my water tank. My water is both softened due to where we live and also reverse osmosis filtered. 

I use Klaudio's ultrasonic machine and distilled water and that suffices for the vast bulk of my LPs.

Same here.  I still have my VPI 16.5 that gets used for really dusty/dirty used records.  

Fbgbill, What exactly does the photoflo do? 

I use an Audio Desk to clean using their cleaner.  I rinse using a Degritter with only their wetting agent (Rinse Aid).  Most records are dead silent or nearly so.