This cleaning is recommended after a day of wearing the mask to ensure viral inactivation and to properly dry the cartridges, especially if used in a humid environment. Place the filter cartridges in your oven at 90°C (200°F) for 10 minutes. The rest of the mask should be washed with hot soapy water, or with a virucidal cleaning solution.

If you have chosen the wide strap (without Stop Cordon), you can put the entire mask in the oven at 90°C (200°F) for 10 minutes.

If you wear the mask in a humid environment, or if you feel decreased breathability, it is possible to increase the oven temperature to 110°C (230°F) for 10 minutes in order to dry the filter ceramic.

WARNING | Do not put the Stop Cordon in the oven as it could deteriorate.

Once a month or after storage for more than 4 weeks, it is recomended to soak the PRECIMASK® filtration cartridges in boiling water for 30 minutes. Then, dry in the oven at 110°C (230°F) for 1 hour.

WARNING | Handle the filtration cartridges with care when they come out of the oven so as not to burn yourself and wait for them to cool completely before putting them back on the mask.

This step is to be applied only to filter cartridges in case of clogging of ceramic filters by dust for example.

• Soak them completely in 1 litre of a mixture of 3/4 water and 1/4 boiling white vinegar 8 ° for 30 minutes.
• Drain the cartridges and then let them cool down.
• Rinse them with clean water for 10 seconds.
• Repeat a full Type 2 cleaning.