★★★★☆
I read, on the net, that if you swab your nose with castor oil, a thin coating, it will help & it has! I can't smell in full or properly, but it's there & that is HUGE for me!! I don't do it everyday, nor every week or month, but plan to do it more often now that I've realized just helpful this is.
Unfortunately, I cannot find that article that made the suggestion.
Since I use such a small amount of castor oil I'd think there is no risk or harm involved, but I am not a doctor and if anyone reads this and finds that statement to be inaccurate, I'd like to know.