@oly78 I had the goo and it was sticky, but mine was really bad with infection from the spike proteins so it was yellow. There were several times when I flushed with the Navage that long yellow tubes would be released into the container. When I would watch them, they 'moved'. It was like the twilight zone to see this stuff coming from my nose as I had NEVER had even a sinus cold in my life. I had to go through 4 ENTs before I found the ONE that heard me and took me on as a patient. He knew how to deal with COVID in the nose. See if you can find an ENT in your area that deals mostly with micro nasal surgery. It is robotic and it likely will be the surgery that can stop the drainage. My turbinate on both sides were totally clogged shut. He cleared with a laser. Then he looked at the drainage for the Sphenoid but this was the dangerous part of the procedure since it sits right on the brain. It was clogged shut so he did a slight enlargement with the laser and minor flushing so the goo could be released. And oh did it start flowing. Micro surgery does not 'scrape' as this can cause more damage and even permanent damage. There was laser trimming on the main left and right maxillary sinus cavities to make sure the drain was open and light saline flushing of the yellow goo from each side. Think of these openings in the sinus as a door that opens to release and then closes. Mine had been jammed shut. I had a minor nose injury so while he was there he straightened my septum as one side seemed to be holding pressure on the natural drainage. That was the beginning of stopping the phlegm. But it took some time with hourly saline flushing when I returned home. Be ready he said as when you use the blub of saline water to flush, this is going to look like a major CSI crime scene. He wasn't wrong there! It has been a year and no more phlegm, no headaches, no yellow drainage. I flush every morning and every night now to keep things clear. I randomly pull out the old Covid test strip every few months to make sure the clear drainage does not pop positive!