re: Difference in the Keurig models?

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Somehow mine is still running without ever cleaning it. Ive heard to run vinegar through it, but when you do, how hard is it to get the vinegar smell/taste out of the machine? Do you run a few cups of water through it after?

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We did it about a year ago, and I'll admit that we had to flush water through it like 20 times in order to totally get the taste/smell out. My brother did it and ended up just flushing a few K-cups through it in order to fast track the process, but it takes several runs to get it out.