TikTok is home to a host of various "life hack" videos that offer up advice on how to travel, cook, sleep, work, and generally live better.
Though at first glance it doesn't seem like a traditional "life hack," there's a new trend taking over the platform that gives viewers an insight into the tips and tricks you only know if you work in a specific environment.
Typically captioned "5 things I would never do," the videos show people disclosing things they know to avoid thanks to their jobs, and it's been used by everyone from hotel workers to doctors.
The videos typically use the hashtags #thingsineverdo, which has over 12 million views, and #5thingsiwouldneverdo, which has over 10 million.
Many of these videos have hundreds of thousands of views, with some reaching over 1 million.
Here are nine pieces of advice from TikTokers who say they have insider knowledge.