I noticed similar behaviour in one of me Females who escaped and spent 2 seperate nights in my cold front room.

She shows no other signs of R.I and when she lays in her tub she acts and sounds normal , no mucus and her nostrils are dry and clean, get her out of the tub and hold her for a bit ans she starts weezing. She is booked into vets for tomorrow so ill let you know what advice they give me for reference but you definately need to take the snake in.

I have had a bad year for R.I due to a few school boy errors but everyone i have had checked out by a vet.

You need to try some charm on your old lady. Get her on here and show her some of the opinions people have shared on the subject.

She clearly doesnt want to waste the money and who would want to blow $100 or so if they dont have to..... but its not about wasting money.. its about piece of mind and the health of a snake.