Breathe through both nostrils all day. Blockage occurs especially in dry weather. Remove sinus gunk where tweezers and Q-tips can't reach. Salt water and a syringe recommended by my physician. Get a 16 oz container; fill with drinkable water. Add 1/4 teaspoon of baking soda and 1/2 teaspoon of table salt. Stir. Saltwater made. Put some into a small bowl and microwave 20 - 30 seconds. Pull some saltwater into the syringe and tilt head back. Release gently into a nostril. I spit out back through nose mostly and a little through the mouth. Repeat and then move onto other nostril.