Marks caused by suction clips

[Daryl12345]

Hi
My daughter put a few suction cup hooks up on the plastic shower doors. She didn’t use water! Instead licked them and fixed them to the doors a while ago.
i cannot remove the round circle stains now I have removed them. It appears that the saliva has damaged the plastic!!!!
Help please with any cleaning hacks you may have. Thank you

More likely to be limescale build up or ingrained dirt. I don’t think saliva is that acidic to burn into plastic. Try a bit of white vinegar to shift it. Nail varnish remover /window cleaner works in the car to remove the suction marks left by camera and sat nav.