A new study published in the American Journal of Infection Control has debunked the belief that flushing the toilet with the lid down can prevent the spread of germs. Researchers discovered microscopic viral particles throughout the restroom, regardless of whether the lid was up or down.

Lead researcher and microbiologist Charles Gerba explained that many people believed closing the lid would solve the problem. However, the study revealed that when a toilet is flushed, the air carries the viruses in the bowl and spreads them around the surrounding area.

While previous research suggested that closing the lid could reduce germ transmission by containing larger viral particles, Gerba emphasized that this new study focused on smaller particles. Surprisingly, the study found that closing the lid did not significantly reduce overall contamination in the bathroom. It did, however, alter the trajectory of the germs, leading to slightly higher contamination to the left and front of the toilet, and slightly lower contamination to the right.

The study's findings highlight the importance of disinfecting the toilet, toilet water, and nearby surfaces as the most effective method to curb the spread of germs. Gerba recommended using a scrub brush and hydrochloric acid disinfectant to ensure thorough cleaning of the toilet bowl. He also emphasized the need to regularly clean the toilet seat and other areas in the restroom.

Additionally, washing hands with soap and water is crucial. Experts advise washing hands for 20 seconds, as germs from the bathroom can persist on surfaces for up to 30 minutes after flushing, according to a study published in Antimicrob Resist Infect Control.

To further minimize exposure to bathroom germs, experts suggest keeping personal items such as toothbrushes and cosmetics away from open surfaces, as well as avoiding the use of smartphones in the bathroom.

Overall, this study serves as a reminder to focus on proper hygiene practices and regular cleaning to combat the spread of germs in bathrooms, rather than relying solely on closing the toilet lid.