I clean 3 records at a time using distilled water with Tergitol at 90 degrees F, and then a final rinse. After about 30 records so far the results are pretty amazing, there is no surface noise during playback, only music!. Even records that have been carefully handled and hand cleaned before each playing are improved. It's a most cost effective way to make vinyl sound like new.
(I did replace the power supply to the motor that rotates the records as I felt the supplied one spun records too fast for optimum cleaning).