DISCLAIMER: I am not a paid spokesperson for the microfiber cloth industry just someone who was impressed with how well they clean records.
The flea market guy was at his stall Saturday - normally he has someone run it for him - and he told me how he cleans almost all of his records (not for 78rpms or shellac). He has a spray bottle filled about an 1" or so with alcohol and the rest with distilled water. He sprays the record and uses a microfiber cloth to clean. Across the street was an auto parts store so I bought a dozen small cloths and tried it. I was amazed at how much dirt that cloth pulled out. It was a lot.
I was also the first person to dig through two new crates of 45s. I pulled out a lot of small Southern labels from Nashville, Texas, Alabama along with the usual Stax, Chess, etc. There were a lot of gospel 45s in the crates too. Good haul - picked up just shy of 100 - but no discount this time due to me popping the crates' cherries so they were a straight $0.50 a piece. He did throw in a mint picture sleeve for a Creedence 7" I have so that was cool. Here are few that I got.