Astronauts brush their teeth in space using a few specialized techniques, since traditional methods aren’t practical in a microgravity environment. Here’s how they do it:

Toothpaste: Astronauts use a small amount of toothpaste, typically a non-foaming kind, to minimize the mess. They apply it directly to their toothbrush.

Water: Instead of rinsing with water, astronauts usually use a small amount of water from a special pouch or straw. This prevents water from floating away.

Brushing: They brush their teeth just like on Earth, but make sure to be careful so that any debris or saliva doesn’t float away.

Cleaning Up: After brushing, they wipe their mouths with a damp cloth or a tissue designed for space use, and dispose of any waste in a sealed bag.

This method allows astronauts to maintain oral hygiene effectively while avoiding the challenges posed by microgravity.