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I know there will be alot of comments on this but I gotta say, usually when Im jigging of its cold enough for the rod guides to freeze up its usually the one on the very tip of your rod. Just pop it in your mouth for a few seconds and the ice will melt right off. Works fast no chemicals required.
I'm pretty sure Giardia comes from rotting animals or raccoon feces I'm not too worried about it. I don't drink it it works for me. Funny thread this has become.