It’s safe to say that no one’s a bigger expert on hotels than the people who work there. From housekeepers and front desk clerks to the people who own hotel properties, they’re the first to say there are certain do’s and don’ts when it comes to hotel room behavior. To be clear, when you’re staying at a hotel, you’re on vacation — you should feel free to have a great time.

Within reason, of course. Below, hotel workers share what they would personally never do in their hotel room. They don’t leave uneaten food in their room (or even in the hallway).

Ordering room service is one of the best parts of staying at a hotel. But when you’re done, it’s best to let the hotel staff know. “If we eat food in the room, I always make sure that I call room service to come remove it, or I make sure that we take the trash out of the room because it drives me bananas when people put the food out in the hall and don’t let anyone know, resulting in it sitting in the hallway for hours,” said Trisha Pérez Kennealy , owner of Inn at Hastings Park in Lexington, Massachusetts.

They don’t overuse or misuse towels. You’ve probably seen signs pop up in hotel room bathrooms in recent years about reusing towels for sustainability purposes. And indeed, people who work at hotels are all about hanging them up for future use.

“I am fully capable of reusing towels,” said Mary D’Argenis , founder and CEO of MDA Hospitality Solutions, a company that trains hotel staff. “A.