So what mad you try toothpast of all things ?
I know it has all sorts of uses,
like a cutting agent for removing oxidisation on those plastic headlights you get on modern cars.
In the bathroom looking around for something more serious. Bleach, no, shampoo, no, surface cleaner (tried it) no, hmm, toothpaste - I wonder?
It was that or wash my hands in IPA or white spirits to try and shift it.
I now wonder how good it would be at cleaning the outside of 60l collection drums.