I'm trying to get rid of urenoma on 3 clown fish and I just did a freshwater dip for 5 minutes before putting them in the new tank and those things were absolutely stressed out. Took them quite some time before they were acting normal again.
I am assuming they're now urenoma free since it seems like freshwater should kill any of it that could potentially be on them, but I'll still likely do it one more time.
Also, are you FW dipping them between every TTM? You don't need to do that, just transferring them is enough.