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Hello - We suggest taking out the reservoir and cleaning it weekly. If you prefer, you can use a small bottle brush. Additionally, run vinegar through the unit monthly. For more details, visit our cleaning blog: https://www.waterpik.com/product-support/articles/how-to-clean-waterpik-water-flosser-vinegar/
Sorry, there was a problem. Please try again later.I've flushed with just running cleaning water through it. If you have hard water, run vinegar through it like a coffee maker
Sorry, there was a problem. Please try again later.I just wash it out like washing a pitcher
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