Cleaning Tricks and Tips

That spotty shower head in your bathroom is just as gross as it looks. In fact, one 2009 study published in the journal Proceedings of the National Academy of Sciences of the United States of America found that 20 percent of shower heads tested were contaminated with Mycobacterium avium, which can cause serious respiratory health issues.

Luckily, keeping the outside of your shower head clean isn't difficult. "Fill a sandwich bag with white vinegar and attach it to your shower head with a rubber band, leaving to soak overnight," suggests O'Hanlon. In the morning, those marks will wipe away with ease.