Nose Douche
It sounds gross and the pics on the box of a person bending over with a squeeze bottle pointed up their nose kind of looks gross, but NeilMed Sinus Rinse actually works. Generally I am anti squirting anything into any orifice, but if you have sinus issues, give it a try, it really works.
Seriuosly, it's snot bad at all. Thanks to Matty for sniffing out a solution to my nasal nusiance.