I too follow Neil’s method, now doing a pre-cleaning of used records, holding the LP above the sink while gently running a cleaning brush around it after having squirted the surface with a diluted Liquinox solution. I hold the LP above the sink by means of one of those devices sold on ebay: the device is a pair of plastic discs slightly bigger than the center paper label on LP’s---each with a rubber gasket on it’s inner side, and a wooden handle with a bolt that passes through the center hole in the LP, a nut on the side opposite the handle with which to secure the two discs onto the LP.
From there the LP goes through the same regiment as non-used LP’s:
1- A cleaning on the VPI HW-17 (a spare mat having been placed on top of the HW-17’s mat for the cleaning and drying of the first LP side), applying one of a variety of cleaning liquids to the LP via a handheld bottle and spread via a handheld brush, then vacuum dried. Repeated on the second side, the spare mat having been removed before the cleaned and dried side of the LP is placed onto the 17 platter’s cork mat.
2- Then into the DIY ultrasonic cleaner that is filled with distilled water into which has been dropped Neil’s recommended amount of Talas brand Tergitol 15-S-9.
3- Then back onto the HW-17 for a final rinse of pure distilled water dispensed from the 17’s internal tank and spread via the 17’s swing-out brush, followed by two revolutions of vacuum drying. By the way, I have two VPI vacuum wands, one used for the first drying, a second only for drying after the final rinse.
I sure wish this level of LP cleaning had been possible when I first started buying LP’s in the early-60’s!