I like your DIY approach, definitely will try that next time I remove my cassette. Maybe sell my Park chain whip tool if that works.

But have to ask about the cleaning, do you mean the typical pipe hanger plumber's strap of metal with the holes in it? I mean the metal doesn't soak up any dirt. Today the first time i heard about the floss, and even found cheaper bulk floss than the brand type mentioned above. that seems a good idea, better than my rags in the cassette. Or were you just kidding with the strap? If no, please explain how that exactly works.