Try a neti pot. It takes some getting used to, but it's the only thing that has actually worked for me with no side effects.

Havn’t had Polyps but always feel like I’ve got a cold always suffering from sinus problems and really bad sinus headaches

My Ent gave me a salt water nasal spray. You can use it as much as you want. Really helped me. I was told to do adaily sinus rinse as well, neilmed.

Does your nose continuously leak ? If so please see your doctor.

Could the steroid nasal spray be making it worse? And/or causing it? My hubby got thrush all over his mouth when had to use steroid spray inhaler. I don’t know, but steroids can be so strong, so it was just a thought.