I have acquired ~8,000 neglected records that I am sorting thru right now. Most of them are a mess; Dirt, mold, you name it. Step 1. Clean with VPI Cyclone using a 3 step process. Step 2. Use a HumminGuru for Ultrasonic clean and final rinse. Step 3. Back to the VPI for vacuum dry. Step 4. If necessary, Sugar Cube to listen. Even after all that only a small percentage are retained in my collection.