Hocking loogies during a pandemic

For about four years I had an Airbnb in the Mother-In-Law guest quarters attached to our house in Florida. The area has its own entrance, and there’s a locked door between the Airbnb and our main house, so there is no feeling of our privacy being invaded. The guests have been lovely, appreciative and have taken excellent care of the very clean space. However, one long weekend, we had a couple staying in the Airbnb who apparently…