I currently own an Avon S10 gas mask, and it has been making a popping sound. Does anyone know why?
•The filter has expired•The mask was produced in 2001•The sound is only emitted when I exhale. or:\u2022The filter has expired\u2022The
•The filter has expired
•The mask was produced in 2001
•The sound is only emitted when I exhale.
or:\u2022The filter has expired\u2022The mask was produced in 2001\u2022The sound is only emitted when I exhale.
