For sinus infections I would add to a nasal irrigator: salted saline w/ xylitol and a couple drops of methylene blue.

It hurts but it works. You can add to a nebulizer and breath if lung symptoms.

Taking grapefruit seed extract (Pure Encapsulations) with meals for a couple days is a good extra measure.

Use sparkling saline every day for at least a week after irrigating.

1/2 tsp of baking soda in water before bed to increase bodily CO2.