If you do use alcohol, definitely get 99% isopropyl- see Gargoyle's post above. Residue is the reason. I personally use dishsoap, rub it around around WITH the grooves, as many others above have warned, and use warm running water long enough to get all the detergent residue out. Shake the drops off and dry them off with a soft old t-shirt. I've never used a cleaner, but I may go and try one- got several hundred LPs to part with after retirement, before moving.   Carter