Remove urine stone mechanically

Many of the posts that I have read on this topic try to remove the problem of chemically solving urine stone. "My" problem I solved with a round wood "biomechanically".

A straight piece of branch (round wood from hardware store) scarcely 2 cm thick, approx. 50 cm long. An end carved so that it looks like a flat screwdriver. Then scrape parallel to the wall. Wood is softer than ceramics, something is rubbed off during the action.

Some debris blows it away, for others you need a little patience. But at some point, the areas you get to are free again. The cane now has a fixed place next to the toilet brush.