Avoid urine stone under the toilet seat
After I painstakingly removed urine scale deposits from the underside of the toilet seat, I considered how to avoid creating new urine stone there:
Since grater I after cleaning the bottom of the toilet seat (in the front area) with a little olive oil. I think that the urine does not bind easily to the plastic due to the oil film.
So far that works. The long-term effect still needs to be tested.
With every cleaning, the old oil film is removed by the cleaning agent.