When you put the second valve on, you oriented the exhaust up instead of down. To help keep from fogging, especially if working at a fast enough pace to work up a sweat and breath heavily, you want the hot air exhaust as far from your glasses as possible. So far, I have been able to fog up my glasses every time I use it. What is your suggestion to keep that from happening?
Hi there! Could you confirm what you mean by the packet of carbon? Each mask comes with one extra filter - which one layer on the inside is the active carbon. Our customer support team can help with any other questions at support@rzmask.com. Thanks!
Depending on what you are doing, if you are in high dusty environment you will be able to see all the dirt trapped in the mask and replace after that become dirty. Otherwise every 40-60 hours of use you should change out your filter.
