Do you have a humidifier? Here in the North East when it gets really cold and the heat is on a lot, my sinuses go wild.
My ENT gave me a spray bottle to use to rinse out my sinuses, very similar to a Neti pot, but it's a squeeze bottle. Sometimes I don't have any solution so I just use plain old tap water. It burns a bit, but it does help. Even taking a shower I sniff the water in and out a few times, that helps as well, but a humidifier does put moisture in the air. I hate it when you walk across the room and touch something and get a shock, then I turn the humidifier on.
Not crazy about the portable ones you put on your furniture, they can stain it, so I have a small floor model unit.
Try getting a small unit, they are fairly inexpensive. Good luck...JJ....