A teacher has gone viral online after sharing the results of an experiment she ran in her class.
"We took fresh bread and touched it." her post on Facebook began.
"We did one slice untouched. One with unwashed hands. One with hand sanitizer. One with washed hands with warm water and soap. Then we decided to rub a piece on all our classroom Chromebooks."
"As somebody who is sick and tired of being sick and tired of being sick and tired. Wash your hands! Remind your kids to wash their hands! And hand sanitizer is not an alternative to washing hands! At all! This is so DISGUSTING!"
You can see the results of the experiment upclose - but be warned, they are pretty gross!