Based on some of my cursory research, TSP seems to be bad for the environment and is toxic. So just to play it on the safe side I want to see what people have used that is effective for preparing walls for painting.
TSP is suppose to clean and degrease the walls. What other things do that? Simple Green(?), vinegar, etc.
I've seen substitutes out there but I want to know what works the best and gives the same results as TSP.