Cleanup is really a breeze. Charlie covers this in a fair amount of detail and gives you a few options on how to get it done. All the heat is on the bottle at the point of penetration and people are instantly reaching to inspect that bottle, which can be done immediately after the penetration. They can check the bottle out before as well!
This is a comment I made in regards to reactions and performing this multiple times in a row for a growing audience:
Against the norm I did the same thing once during a party totally surrounded. It just so happened that people were coming in from the outside after smoking after the first performance and missed it. Then I did it again. Afterwards those people ran outside and grabbed everyone outside smoking and brought them in to watch. At this point we are probably talking about 15-20 people standing around me now and I performed your masterpiece again and the entire room erupted into chaos. I don't think there is anything else out there I have had more fun doing for people than Prohibition at a party. I can never really thank you enough for putting this out there for me to learn =)
I will also say I have had people sit there in absolute silence or looked at me like I had a 3rd eye implanted in my forehead. Everyone is going to react in their own special way but this is one of those effects that is fun to perform, not too difficult, and something I believe anyone has the capacity to perform in the right environment.
--Jim