THis migth not have anything to do with it but i got two boughts of brochitis that turned into a sinus infection that i couldn’t shake off all winter but I think that its just the combo of swinging chairs on the weekend at the ski hill paddling in december then sleeping in snow caves once a week that did it to me. My suggestion is farmer blows on the skirt constantly you don’t even need to clean it off! thats the beaut! If you have nose plugs on just tilt’ er back and give it hell.
Another side note would be to get completely dry after a long day of paddling and getting enough sleep that night