Tricky!: This really depends on what questions you're trying to answer. The most important questions i can think of about (non)/alcohol-based rinses include both bacteria and human elements. It sounds like you're trying to zero in on chemistry without biology; understanding your results may lack biological relevance, set up a test that shows the effect of (the alcohol) on another substance material or dye.
Answered 11/30/2012
5.5k views
BYOC: Bring your own cup, or a number of small disposable cups!
Answered 11/30/2012
5.5k views
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