It was time to erase the unsightly hard water limescale mark in my toilet. Rather than chuck some chemicals down there, I experimented with using vinegar to clean.
First of all I put some white wine vinegar (purchased in bulk from Summer Naturals) in a spray bottle and applied it to the stain. As I could not drain my toilet it was impossible to immerse the whole bowl in vinegar, as was suggested by sites I had found online. I still wanted to turbo charge the clean so I soaked a sponge in vinegar and wedged it in the top of the toilet bowl.
I left the sponge there for two hours and sprayed on additional vinegar with the spray gun intermittently.
The limescale isn’t completely gone but it is the best it has ever looked