I have a chronically clogged sinus on my right side because I swim 3 or 4 times a week and do rotary breathing with that side up. I use Swim Ear every single time to get the water out, but it must be in there too far. When I go a week without swimming it clears up.
I have to do the Neti pot before I get too clogged up when I'm sick or during allergy season because I can't get it through if I let it go too far. It really helps with itchy eyes.