"Orange cleaners" that use citric acid as active ingredient may be ok, but first check to make sure it does not damage the covering. I stay away from any cleaners that use chlorine, or chloride. Old fashion soaps work well for many things but probably not your wall. Green works by chlorox seems to be environmentally friendly, but I'm not sure about what is on your wall. Again, test first to make sure it will not damage any coverings or materials.
Best wishes, & hope this helps
