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Hello Will, this is Kelly with Dyson. You can use vinegar to clean your PH04 if you're unable to locate or obtain citric acid. Best wishes, Kelly Dyson Customer Support
Sorry, there was a problem. Please try again later.I would only use what’s recommended so you don’t void the warranty. My unit did not perform as it should, especially for the price. Save yourself some money and go with a different product.
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