Two steps, one to clear the sinuses and start healing and the other to combat the infection.
If your sinuses are completely blocked you should Not use a Neti. You can do a search on Neti Pot and find the directions. To make a good balanced Neti salt simply take 1/4 to 1/2 teaspoon each of good quality baking soda and sea salt and dissolve in hot water (8 to 10 ounces). If you have any downing sensation at all that means the water is not warm enough. It needs to be much warmer than most people realize. For sinus infection it can be used several times a day but do not use within an hour bed and don't use if there is complete sinus blockage.
Echinacea is the best, strongest and easiest to use of the herbal antibiotics in my opinion. There are others and most can be combined. Adding honey boosts the herbals. Like any antibiotics, herbal antibiotics would be used for 7 to 10 days and then ceased for 14 days or more so that resistance isn't built up. Garlic and Gold seal are my two second favorite antibiotics and they can work well togtehr.
Also, boosting the immune system so that your body can better fight the infection. I prefer Pau D'arco, it, jump starts and boost the system plus enhances several other immune boosters and antibiotics. It works very well with echinacea.
I am not a doctor in any way, shape or form.
Please consult your Care Provider before using any herbs or natural medicinals. Anyone can be allergic to anything, if you're unsure it's better not to use it. Double check everything with you Care Provider if you're pregnant or nursing.
Nothing works for everyone and nothing works exactly the same for everyone. Do the research yourself. Don't take any one persons word for anything, no matter how knowledgeable they seem. Doctors with years of experience make mistakes that cost lives. It's your body, (your home, your car, garden, etc etc etc) take responsibility for it.