PHILIPS USA PH62020 Wet-type Cassette Head Cleaner (Discontinued by Manufacturer)
For use with all home and car cassette recorder/players.  The cassette head cleaner uses non-abrasive cloth tape and cleaning fluid to gently clean away dust, dirt and oxide build-up without damaging tape heads, guides or pinch rollers.  For every 20 hours of playing time, insert cassette head cleaner one complete pass. It's 6 easy steps and your recorder will work like new!