Smoking It Up

There are three filters on my CPAP machine: a reusable foam primary filter that I clean and replace every two weeks; a single-use secondary filter that I replace every four weeks, and a tertiary filter between the hose and the mask that I replace every six months. Today was the day for replacing the secondary filter.

( Glad This is in the Filter, not my Lungs )

I sleep more easily not only because the CPAP keeps me from snoring, but also because its triple-filtering the air. This is about the only filtering I get, because we do have to keep the windows open at night except in the worst conditions.