Why Do I Still Have A Lingering Smell Like Frying Oil Or Burnt Toast After Recovering From COVID?

Hello. I was affected by corona virus a month ago and lost my sense of smell for for that period of time, when I regained my sense of smell again there has been a lingering smell in my nose I cant get rid of like frying oil or burnt toast. I tried natural oils but the smell is still there. Thank you for looking at this