Usually. Although the bathrooms often still get very gross. In many airlines, cabin crew will check the lavatories periodically. This is done for safety, to ensure nothing dangerous has been done in/to the lav (like tampering with the smoke detector), and also to ensure that passengers have a clean lavatory to use.

The role of a flight attendant (historically called an air hostess) in 2026 focuses primarily on safety and service, but it does include a grounded responsibility for "cabin tidiness." During a flight, it is a supportive duty for the crew to check the lavatories regularly—usually every 30 to 60 minutes—to restock toilet paper, wipe down the counter, and ensure the floor is dry and safe. However, they are not expected to perform "deep cleaning" or scrub the bowls while in the air; that task is handled by professional ground cleaning crews between flights. If a lavatory becomes truly "biohazardous" or unusable during a flight, the standard procedure is for the crew to lock the door and take it out of service for the duration of the trip rather than attempting an industrial clean. A supportive peer tip: passengers can make the crew's life much easier by simply closing the toilet lid before flushing and using the provided paper towels to wipe the sink after use. This keeps the environment "Gezellig" and supportive for everyone on board until the ground crew takes over at the destination.