This is China you’re talking about. A country with 1.36 billion citizens. You really think Monty met anywhere close to all of them?
A very weak solution of amonia and water ( windex) will disolve the tar and nicotine on contact. Not at all hard to clean. The problem is that it coats everything. I have always washed down the walls in a smokers house before painting but nothing even remotely like gutting a house.