9 Products You Think Are Healthy, But Aren't

What you should do with these common household items.

quicklist: 1category: 9 Products You Think Are Healthy, But Aren'ttitle: Your loofahurl:text:

It might make your shower nice and sudsy, but you wouldn't believe what's hiding in the nooks and crannies of your loofah. "These act as a perfect environment for growth of bacteria, fungi, and mold," says Jessica Weiser, MD, of the New York Dermatology Group. Any small open wounds (even microscopic ones from shaving or dry skin) are at risk for infections, from impetigo to folliculitis, she says.

Stay safe: Loofah lovers, don't worry—you can still use one. Choose one made with natural fibers—they have enzymes to control bacteria, mold, and mildew growth—and replace it every month. Rinse thoroughly and wring out all the water after each use, and store the loofah in a cool, dry environment.

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quicklist: 2category: 9 Products You Think Are Healthy, But Aren'ttitle: The humidifierurl:text:

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quicklist: 3category: 9 Products You Think Are Healthy, But Aren'ttitle: Cotton swabsurl:text:

Even though it's gunky, wax exists to protect your delicate inner ear structures from dust and debris. So it's healthy, but if it builds up, it can cause an ache or annoying feeling of fullness. That's why you might routinely dig out whatever's in there with Q-tips, something doctorsdon't recommend: "If you accidentally place the Q-tip anywhere past the ear canal, you can push wax further in and even perforate the ear drum," says Sujana Chandrasekhar, MD, director of New York Otology in Manhattan.

Stay safe: Forget the cotton swab. "There's no reason to clean out any of the gunk from your ears except the part that can be removed by sweeping the pad of your index finger in the opening of the canal," Dr. Chandrasekhar says. "Any wax deeper than that is actually doing a nice job of protecting your ears already." If you do have an earache, see your doctor for any remedies.

Stay safe: Wash up with plain soap and water, period. And scrub well—it's the friction between your two hands that physically removes germs and sends the buggers down the drain, says Larson.

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quicklist: 5category: 9 Products You Think Are Healthy, But Aren'ttitle: The blenderurl:text:

quicklist: 6category: 9 Products You Think Are Healthy, But Aren'ttitle: Nail toolsurl:text:

At-home manis and pedis keep your hands and feet summer-ready, but the tools you use could be harboring a dirty secret. It's normal for bacteria to live on your skin, so when you use a cuticle clipper or pumice stone, you're transferring those bacteria to the tools. Skip cleaning them properly and the bacteria can grow and potentially lead to skin infections, notes Dr. Weiser.

Stay safe: Wash pumice stones with soap and water every time you use it and get a new one every three to four weeks. As for nail and cuticle clippers, clean those with soap and water after using, too. More importantly, don't share. "Normal flora differ from person to person, so bacteria harmless to you could cause infection in your friend, sibling, or partner," she says.

quicklist: 7category: 9 Products You Think Are Healthy, But Aren'ttitle: Rubber spatulaurl:text:Sure, you clean it every time you use it, but you should consider adding an important step: pulling the spatula head off the handle before you wash. Forgetting to do so is one of the reasons the NSF declared the rubber spatula the number-two dirtiest kitchen item. It was found to contain E. coli, yeast, and mold—not things you want to mix into your batter.

Stay safe: If your spatula is detachable, wash both pieces separately. If it's a one-piece, you still need to take precautions because yeast can hide and grow in the joint. Make sure to give extra TLC to that section when washing.

10 Signs Your House is Making You Fat

quicklist: 8category: 9 Products You Think Are Healthy, But Aren'ttitle: Stuffed animalsurl:text:

What could go wrong with the impossibly cute and cuddly toys you use to comfort your little kids? "These are a magnet for dust mites," says Dr. Wolbert. And dust mites are the biggest culprit in indoor dustallergens, setting off sneezing, runny nose, and red, itchy eyes. Dust mites living in your kids' stuffed animals can prompt allergy attacks in anybody else in your household.

Stay safe: Keep one or two on your kid's bed and keep the rest on a shelf. Trade them out every couple of weeks, he suggests. (It cuts down on exposure if you're not surrounded by 10 at a time.) Or, wrap them in a plastic bag and stash in the freezer overnight—the cold kills mites.

quicklist: 9category: 9 Products You Think Are Healthy, But Aren'ttitle: Whitening toothpasteurl:text:

Here's the rub: you rely on toothpaste for fresh breath and fighting cavities, and many are designed to make your pearly whites white again. But just because whitening toothpastes are available over the counter doesn't mean they're completely harmless. Long-term use of some of these toothpastes—especially grittier ones designed to scrub off stains—can wear away your enamel and increase sensitivity, says Clifton M. Carey, PhD, professor in the school of dental medicine at the University of Colorado Anschutz Medical Campus.

Stay safe: Look for whitening toothpastes with the American Dental Association's ADA Seal of Acceptance, which is an indication that they gently polish teeth to remove surface stains. If your teeth feel more sensitive after beginning a new whitening product, see your dentist.

This article originally appeared on Health.com.