Be honest how many are following these general rules? I know I’m not I have one hanging from indicator to use when I go in certain places!
How long do I have to wear each mask for before changing to a new one?
There is no set time, nor recommended number of masks you should use each day. It all depends on what you are doing.
However, if your mask gets dirty, wet or damaged, or if you touch the inside of it, then you should change to a new one (following the steps above).
When you take it off to eat or drink, you should dispose of the old mask, wash or sanitise your hands, and replace it with a new one once you have finished eating.