Bucket of coca cola...
Tile cleaner is often phosphoric acid which is the same as is in coke. Occasionally it's hydrochloric. Concrete firms generally use hydrochloric acid to clean off concrete and the likes from lorries. Sulphuric acid will dissolve your trowels if yoj leave it too pong especially the strong stuff. Vinegar is acetic acid... one of the weak acids so will work but will take a long time.
Tile cleaner is often phosphoric acid which is the same as is in coke. Occasionally it's hydrochloric. Concrete firms generally use hydrochloric acid to clean off concrete and the likes from lorries. Sulphuric acid will dissolve your trowels if yoj leave it too pong especially the strong stuff. Vinegar is acetic acid... one of the weak acids so will work but will take a long time.