Always carry a handkerchief
Don't become that annoying person who sprays around anti-germ products and takes out sanitizer each time they touch something making it unbearable and irritating for other travelers.
Often people who do not carry a handkerchief swipe away that layer of sweat over the forehead with either their hands or sleeves, not only this is unhygienic but also are bad etiquettes.
Carrying a small handkerchief ensures that you are kept away from unwanted germs in a hygienic manner.
