Dear session participants, a … topic, I know. I thought I would have gone through it and now that. It had to find out that after a 16-day use of the Theatfort cassette, after emptying, flushing, even subsequent use of the chemicals provided by F., there are still visible, albeit film-like residues on the bottom of the cassette. Well, it is important that the cassette is also so clean with longer non-use, that we leave it out … bad. he comparison. What to do? Have the impression, if one does not exactly dose, or T.-Paper uses that is easily biodegradable, that then the well smells do not adjust. I am just in a `test phase ́ with conventional cleaning media as there were … ordinary detergent, have added to it some lime-solver and occasionally is shaken. Can almost imagine, and it will be after the last failures with the prescribed means also in the `active Pha test if only the detergents (liquid) might bring a better success. What do the activists think about it, who have already been through a lot?!