I have several hundred old LPs dating back to the 60's. I have tried a number of cleaning products over the years but the best results come from a specialist LP cleaning machine. It was designed by a guy called Keith Monks, and its used by many professional studios who still need to play LPs. Sadly they costs thousands to buy but Russ Andrews have one and can clean your records for £4 a go. Well worth it!
Russ Andrews Record Cleaning Service

KP