I found another "TAPEX Limpeza" I previously listed in a different drawer. There are only 5 unused pieces. As shown in image 3, you can clean the tape surface by sandwiching it and fast-forwarding or rewinding (do not play). You can use it until it gets dirty. I will include a test cassette (used) so please try it out. Returns are not accepted. TDK, Audio, Tapex