There are a couple of no-nos when it comes to flying. For example, middle-seat etiquette and, during the COVID-19 pandemic, the importance of wearing the right mask on. But of course, there’s always something new to learn to stay safe and happy while you fly. On TikTok, flight attendant Tommy Cimato laid out a list of what he says you should never do on a flight under any circumstance, and it might make you think differently about airplane windows.

In the age of COVID, most of Cimato’s reasoning perhaps unsurprisingly comes from a sanitation perspective. If you have to use the bathroom, for example, don’t touch the flush button with your hands and instead use a tissue. Even though you (should be) washing your hands afterward, the whole thing is kind of gross when you think about it. He also says shorts are a no-no — pants are simply more covering. Even the coveted window seat, which is great if you like to look at the view, comes with problems. You might be tempted to rest your head to take a nap there, but Cimato insists you shouldn’t rest your head or nap on the window because you don’t know what a child, or adult, has smeared on it.

@tommycimato

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♬ Blue Blood – Heinz Kiessling & Various Artists

Cimato also recommends important ways to take care of yourself. Drinking water is super important, especially considering how easy it is to get dehydrated on long flights. It’s important to stay hydrated, and it’s good for circulation. And finally, Cimato says to utilize the flight attendants if you’re getting sick. Flight attendants are there to assist you with anything you might need, including a sick bag, so there’s no need to panic or do it all alone.

These tips for the most part don’t affect the people around you, but they are for your own good.