u/Cha0sWyvern

I live in a rented apartment so I unfortunately can't scratch it out and replace it but I really don't like looking at it : (

All these pictures are taken after just wiping over with cloth and universal cleaner (doesn't seem to get any better than this). I have also tried a mild sander a while back but it felt like I was damaging the rubber.

I have also sprayed for mold (didn't help)

Any tips or products are appreciated, I live in Europe so I might not have access to some of the stuff but I'll try to find equivalents. Thanks a bunch < 3