Every time you play, forward and rewind an audio tape cassette, it will leave oxide and other residues on the cassette players head. This will cause unwanted noise and lower quality while playing or recording and reduces life of your device. Use this amazing kit to clean & maintain your Cassette player/ recorder. Kit includes: One head cleaner cassette, which both side of it are usable. 3 head cleaner liquid solution Simply place about 2-3 drops onto the cleaner tape and play it into your cassette player/recorder until it stops. The tape can be used over and over until liquids are finished.