Comfort factor only.
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Aleecia :Thank you for contacting Water Pik, my name is Aleecia. How can I help you today?
Ted:Why is it recommended to use warm water in the flosser?
Ted:"all you need in your Water Flosser for clinically proven effectiveness is warm water"
Ted:Where is the study proving the clinical effectiveness?
Aleecia :I would be glad to help answer. We recommend warm water as to not cause unnecessary irritation.
Ted:How is warm water more clinically effective than other temperatures?
Ted:Or is the clinical effectiveness independent of the temperature, and warm water is only recommended for the comfort factor?
Aleecia :The only reason why we recommend using warm water is because it may cause less irritation. Purely a comfort factor.