Perhaps the knight in shining armor?

Tried on a colored wall the sponge. The contamination caused by a twining plant, I was able to actually remove mostly without having it look the wall. The color is perhaps minimal with from (depending on how much you rub), but you can hardly see.
Even stubborn marks (again by the creeping plant) on a shelf could be with a microfiber cloth or rag not solve. By contrast, the sponge acts super. If I had not thought of. With a bit of strength and endurance also these traces could be eliminated.
So if you times no longer know what to do, this sponge is exactly right.
Addendum:
Even stubborn stains on tiles could be with ordinary cleaning methods have not solved. The sponge on the other hand looks super.