I bought some used records on Discogs, they were supposed to be nearly mint, but wasn’t near mint at all! Pops and clicks and lotus of nedlegge jumping. For most records one thorough clean was sufficient. But some of them needed an extra round in the Knosti tub. Now my records Are as good as new again ant they sound amazing. Clean records without static have a clean sound like CD’s and with their compact and warm soundimage they sound even better! I first concidered other cleaning systems, but I’m happy with Knosti which also comes with a drying rack, very handy when you clean more than one record (you should do as many as you can when you first start).