We have been using our bathroom as a storage area and now want to start using it as a bathroom again. The wall between the bathroom and living area was very dirty and nothing we had at the house seemed to be able to clean it. I was getting ready to paint
it and be done with it until I remembered a product from 30 years ago that I used on my boat. I finally recalled the name Spray Nine and did a search for it and found it at the local Sherwin Williams paint
store. Well it worked first try spray on wipe scuzz off. I was able to clean the wall completely in about 20 min. This product is very strong so try it first on a small spot before going wild with it. We still have more to clean before the toilet is reinstalled but it's a good start.
First pic scuzzy wall, second pic clean wall , third pic Spray Nine.