About fifteen years ago, I had a sinus operation. Polyps in my sinuses I was told, and it had reached a point where I couldn't breathe through my nose. After the operation (endoscopy, they didn't have to open up my face like they used to have to do, and with an excellent anesthesiologist, I wasn't even there during the procedure!), my ear, snoot, and throat physician told me to rinse my sinuses a couple of times a day.
Neti pot? I've never heard of them until now. The ENT doctor told me to get a Water-Pik with a special attachment. Worked like a charm.
He didn't' say anything about the water, but if I ever need to use the lash-up again, I'll keep that in mind. Thanks for the warning!