White vinegar, soft brush or toothbrush, cloth.
If you’ve just purchased the ProCare Cool Mist Humidifier (Model PCCM-840) or found one without the original paperwork, you’re not alone. This popular, budget-friendly ultrasonic humidifier is great for adding moisture to a bedroom or nursery—but only if you know how to use it correctly. Procare Cool Mist Humidifier Pccm 840 Manual
Drop it in the comments to help fellow PCCM-840 owners White vinegar, soft brush or toothbrush, cloth