I agree with the above posters. Really be careful with not putting alcohol on the rim of the bowl!!!! I recently just learned the hard way about that. I was told though that Everclear and vodka would be better to use. Whiskey isn't a good idea from what I learned, but that's what I know. About killing germs with alcohol, Everclear is a much better choice to use because its almost 90something percent alcohol. If I remember correctly, the percentage of alcohol within a solution needed to kill bacteria (maybe viruses?) needs to be above 65 or 70 percent. Vodka has only 40 percent alcohol per volume I believe, so it won't kill all the bacteria. That's what I know, and I might be incorrect about this. Other thing, I was also told that alcohol from cleaning swabs and medical stuff is not good at all to use on pipes. That's what I know.