Why? The cleaning liquid is ok, because there is nothing to find fault. However, the cleaning cartridge is cheapest quality. The cleaning pad for Capstanantriebe the tape deck are not stored ind simply glued into the case on flexible strips, about can still be seen across. However, there is a NOGO that function at high quality tape - decks (inmeinem case an Aiwa F 660, his time for almost 1000, - having DM) is not even given. Cassette in, press start, it does get -------- NIX. Why? Since this portion has a tape monitoring to avoid Bandsalat "remembers" this Deck the missing leadership roles in low-cost housing of the cassette. Function = 0. Even the cheapest cartridges Kodi possessed such roles. Ergo: cassette screw apart, some took a tape and the tape to implement in a wertigeres housing. In the Gerauchsanweisung is, the tape will run for about 15 seconds. More is in the baggy cleaning tape which processes is not in it, because even after umbasteln the deck failed in a new housing his service because not enough tension builds between the two capstans. Result: Tape on with suspicion onto Bandsalat. Last but not least: the application of the cleaning fluid designed also questionable, since with a duration of approximately 15 seconds so much tape runs out, which of the dribbled liquid which is normally the case only on the visible overhead belt length for a long time in left coil has disappeared. So you screwed up and down the strip by hand, the effect is also = 0. Sorry Hama, which is not quality, but expensive sold Billigstschrott. Therefore only works in old tape recorder billigster design and also because as described more insufficient ...... cassette I've thrown in the trash and keep the emulsion, even going to the post office was to me for this product too much ..... ..Gäbs 0 stars I would forgive them.