Rule #8: Thoroughly wash your hands.
Because they are covered in several dangerous bacteria, wash your hands thoroughly. Keep in mind that we touch our faces somewhere between 2 and 5 times every minute, which implies that we are prone to bringing uninvited guests extremely close to our mouths. And at this point, bacteria may strike. Therefore, after using a public restroom, you should always wash your hands with soap for at least a minute. Try to avoid touching your face until you have thoroughly removed all of the undesirable bacteria. You shouldn't touch any surfaces, including door knobs, once you've finished washing your hands in the washroom!