TRUE STORY:

According to a radio report, a middle school in Oregon was faced with an
unique problem. A number of girls were beginning to use lipstick and would
put it on in the bathroom. That was fine, but after they put on their
lipstick they would press their lips to the mirror leaving dozens of little
lip prints.
Finally the principal decided that something had to be done. She called
all the girls to the bathroom and met them there with the custodian. She
explained that all these lip prints were causing a major problem for the
custodian who had to clean the mirrors every day. To demonstrate how
difficult it was to clean the mirrors, she asked the custodian to clean one
of the mirrors. He took out a long-handled squeegee, dipped it into the
toilet and then cleaned the mirror.
Since then there have been no lip prints on the mirror.