I don't know, I've never tried it. I think a cleaning agent that doesn't foam would work.

Depending on which floors I mop (oiled parquet, tiles or epoxy resin floors), I add a super small amount of cleaning agent. This has always worked without any problems. But you should clean the container after use, as well as the mop roller.

Yes, I've already done that too. However, it shouldn't/shouldn't foam.