While playing your records and even during storage of records, air pollution from outside (car exhaust, dust) and even from inside the house like smoking cigarettes, cooking fumes causes a tough film to develop on your records. This film is hard to clean and cannot be cleaned with a record brush only. The stylus, while playing back, will scrape part of the residue which will gather around the stylus tip, causing distortion in playback or even skipping out of the groove. To avoid this clean your records at least once a year thoroughly. This can be done with a record washing machine. Suitable for all sizes of vinyl records with diameters of 7 inch, 10 inch and 12 inch. Careful! Never use TonarKnosti Fluid or Tonar QS fluid to clean 78 RPM shellac records. The alcohol type used in these fluids can permanently damage or destroy shellac.