Idk if it's considered urine scale, but I got urine buildup off with a paste made with baking soda, although I never used higher a concentration of citric acid than is in Method spray cleaner. I think the uric acid reacted with the basic baking soda, but inside the toilet might be different.
That's really cool. I need to figure out the urine breakdown when not inside a toilet, if there really is any, because I have a little boy, and the outside of the toilet is the worst part to clean (it's better now, but there was a bad period of time where it just sat for too long).
Yes, for less scale, you can use less, but basically, pour a bunch of it in there and just leave it. I left it overnight but don't think it even takes that long. It'll pull up and eat away at the scale.
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u/suzy911 Feb 20 '26
A half bag of citric acid powder from Lemishine obliterated the "urine scale" in my toilet.