I would also make sure the inner sleeves are clean, paper sleeves tend to break down over the years leaving particles on the record. Once a record is clean it’s a good idea to replace the inner sleeve. If the inner paper sleeve is printed you may also want to save it as it will probably add value to the record have the original inner sleeve.
Di I really need to clean my LP's?
Recently, when announcing to a relative my intent to use a recently purchased Spin-Clean Record Washer on some LP’s, of which I am the original owner and which have not been played in decades, her reply was, “If you’ve always handled them correctly, and stored them in their sleeves, why do you need to clean them?” I think that this is a very good question. Is there a good reason for me to clean them?