I'd like to clean nicotine off of painted walls, but I'm not sure if I should use sugar soap, or denatured alcohol (methylated spirits). Which would do a better job all-around, specifically for cleaning nicotine off of painted walls?
I've found that some Trisodium phosphate works great for this. Just mix some up in a bucket and use a sponge, and it should pull the nicotine right off, leaving the paint. I'd definitely advise testing it in a small area first, but I've used it for this exact purpose before.