TFP Kit problems

I too have used MA in my tube without problems, but someone recently mentioned using rubbing alcohol.

Since I had a small bottle of "swimmer's ear drops" hanging around (and it is basically just rubbing alcohol) I squeezed some in to the chlorine tube that gets gunked up and swirled it around and let sit while i performed other tests. Works great! I rinsed it and wiped it out with the paper towel I use when I perform my tests and the test vial is clear as new. I'm going to just refill it the ear drops bottle with rubbing alcohol and keep it in the test kit from now on.
 
Great tips from both of y'all. Way better than my abrasives that scratch the tube.

Thanks!

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