I have been using F10 for a couple of years. When it comes to cleaning the tubs, I clean the tub with soap and water, wipe down with paper towels and then spray F10 and let it air dry; then replace paper towels in tub and put snake back in. I use F10 to clean their water bowls by washing their bowl with soap and water, soak their bowls in F10 (I let it sit for 10+ minutes) then wash out a couple of times and then put back in tub. I hope this helps.