After 23 years of cigarette smoke, these walls were coated in sticky yellow residue. A deep clean with TSP, followed by a shellac based primer, brought them back to life like new. Everyone wanted to know how I cleaned the nicotine residue off of the walls during this free cleaning!! This was such an satisfying transformation, despite being so physically tough #residue The Health Effects of Vaping Indoors Indoor Doctor How to Clean Cigarette Smoke off Walls PuroClean