I’ve been using Xlear for at least 5 years. It’s great stuff. Another great nasal/sinus product is Alkalol. My pharmacist/Brother-in-Law taught me about it. I mix 1/4 tsp of xylitol in it if I’m feeling sinus problems coming on and it stops any infection brewing.
https://www.alkalolcompany.com/
RE: Alkalol
Boy, who would’ve thought that a nearly 120 year old medicine would still be effective today?