I would use this with extreme caution and not use as much as recommended. I will never use it again. Actually I couldn’t get the bubbles out of my RV. I had a hard time rinsing everything completely out. I still have little remnants of bubbles after filling, draining, filling, draining, and all of that multiple multiple multiple times it’s just not worth the trouble that I went through. I followed exactly what the bottle said and I even went from the guide on a video and I had never ending bubbles coming out of my kitchen faucet. Maybe it’s a good product for other people, but I will never touch it again. I’ll use a little bleach next time instead. Use with caution!!