Those are good addendums, but I’ll add one more qualifier to your nasal rinse suggestion. Never use tap water. Use only distilled water or water that has been boiled. Pharmacies also sell aerosol cans with saline solution, which is what I use for the convenience factor. Then you don’t have to worry as much about sanitized water and mixing up a solution. Saline rinses should also have at least half an hour of being upright before laying down. Don’t do a rinse then immediately lay in bed.

If budget isn’t tight, all bedding including the allergy covers benefits from getting in duplicate so you can take your time with the laundry. I was a lot worse about washing bedding when remembering late in the day meant there wouldn’t be enough time to wash and dry before bedtime.