Since my sinuses are prone to collecting household dust, and, due to a design defect, are not efficient at self cleaning, sometimes I need to employ a Simply Saline nasal mister.
The alternative is to watch the Hallmark Channel or American Idol to get some good tears flowing. Good tears aren't always available.
It's pretty basic.
You open it. Make sure it sprays.
You will do both nostrils, one at a time. You will hold your breath while spraying. You will blow your nose with a suitable cloth to clear the salted water.
I clean mine over a small trash collector. Your nose will drip.
Make Sure it Sprays
This is Why I Need It
Here I Go - Spraying in my Nostril
Finish One and Do Other Nostril - then Blow Nose
Basically, you spray into your nostril. Hold the button. Spray for a solid five seconds, or until the spray drips out your other nostril. Switch nostrils and repeat on other nostril. Spray until the spray drips our other nostril.
Then, blow your nose.
I feel better after I spray. You can tell what was in your sinuses, since it's on your tissue after you blow. Sometimes the tissue gets black dust on it. Sometimes blood. Sometimes, just mucous. At any rate, best to have it washed out, than left in your sinuses.