Along with everyone else here, I start with vitamin C, zinc, vitamin D, and also quercetin.
Add a nasal rinse sleep and water to this and I promise you either won't get it or it will be so mild as to not bother you... Nasal rinse is way underrated
I've been boiling salted water, putting a towel over my head and inhaling the fumes, done twice today and it seems to do some good immediately after. I imagine it's similar to what nasal spray does.
When you feel the scratchy throat, a frequent salt gargle helps too.
This recent post had an interesting nebulized hydrogen peroxide treatment https://poal.co/s/QStorm/505271
Garlic - if you don't mind smelling like a spicy sausage for a bit https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7673072/
(post is archived)