[header] How to get rid of a sinus infection without antibiotics [title] Flush your sinuses. [step] Nasal irrigation with salt water can help in clearing the mucus and keeping your sinuses moist. There are different ways of doing this, ranging from bulb syringes and neti pots to pricey irrigation systems. 
Regardless of your preferred method, it is necessary to wash the irrigation device after each use and leave it open to air dry. You can flush each day routinely and may do it twice a day when you have an active infection.