The  mask and filter should be treated like an undergarment and regularly cleaned.

To ensure good hygiene measures we suggest that you place the filter and valves sub-assembly in a pan of freshly boiled water (remove pan from heat source before putting filter and valves in) and let it cool down.

Remove filter and valve unit and allow to stand until dry.

This process will remove facial oils that may build up over a period of continuous use and ensure that it is hygienically clean. The procedure will also remove some of the particulates and organic vapour that have been filtered within the filter or tissue salt build-up from exhalation through the valves.

If the mask cover requires washing this should be done by carefully removing the filter and valve assembly and then washing the outer casing in warm soapy water and then left to dry naturally (not forced by means of heaters and driers).

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