Can you elaborate? I found nothing on the product website about using off-the-shelf detergent.
Scroll down to FAQ, and expand the first question: Is the use of a Bob cassette mandatory?
LE: It's also mentioned in the rewind project's README.
> Credit where credit's due, Daan Tech didn't completely lock down the machine with Bob cassettes. Once empty, you can leave it there and add detergents manually.
https://github.com/dekuNukem/bob_cassette_rewinder?tab=readm...