Facemasks are to be used once.

Don’t wear a facemask and put in your back pocket to wear later. It is “use and discards”. Once you remove, discard.

If you remove a face mask and you re-use it, you will infect yourself with whatever virus the facemask picks up when you put it on the table, in your pocket or anywhere else.

You are better off using a new face mask, or leaving your face alone, than re-using a dirty used mask.“But it’s expensive”

Well, it’s unwise to re-use a dirty face mask because you will re-infect yourself, by rubbing germs/viruses on your face whenever you reuse it. So you are wasting your time.

IF you are well,
IF you are not attending to a sick person,