I grabbed my sister's gown to wipe my nose
Why would you wipe your nose with your sister's gown?
It was the only thing I could find.
It's impolite to use people's clothing as a tissue. You should carry around a handkerchief if you need to blow your nose. You will ruin your sister's clothes and spread germs by using her dress.
So next time, I'll wipe it down with alcohol.
It doesn't matter if the gown is sterile or not. It's gross to wipe your nose on other people's clothing.