I had previously looked up what people are using to clean their pipes and I saw that many people don't bother with "pipe sweeteners" but just use various types of whiskey, rum, vodka, etc. I bought some Bacardi 151 and I have been using this by dipping a pipe cleaner in it or by wiping out a bowl with a paper towel slightly moistened with it. Well, the other day I spilled some. I then took the wet paper towel I had wiped it up with and wiped the outside of the bowl. Whoops. I marred the finish of the pipe. It this normal? Do I need to be careful with this stuff? Are there other parts of the pipe that I will damage with it? Do I need to use something else? Do I need to go down to 80 proof? Please advise.