I've always hand washed each record once and only once. Each time I play it, when on the turntable, I also use a carbon filament brush to dust it followed by a few shots of an Anti-Static gun. The wash is done with a disc doctor pad using a (1/3) 90% Iso-Propyl alcohol/ (2/3)distilled water solution. If there is a stubborn dirty spot I use the alochol at full strength. I dry the records using yellow flannel rags, very soft and absorbent, I've found in the auto dept. of K-Mart. The wet wash is done by laying the record on a flannel rag, spraying each side with an spray bottle (1 pint garden spray bottle) of the solution, wiping hard with the disc pad, flipping and repeating the spray and wipe and then drying with the rag. It takes 2 to 3 minutes per record. Note I use a compressed air can to clean the record liner. It's not an obsessive process but it gets the records as quiet as they can be.