Why do the motion censors for paper towel machines in restaurants always get broken
In: Engineering
* no one bothers to replace the paper
* no one cleans the sensor or cleans it with something that messes up the plastic
* no one replaces the batteries
* people yank to hard or early so the despensor thinks no one got the paper towel off after the last one. You can often fix this one by pushing up the cutting piece.
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