There are some definite dos and don’ts when it comes to cosmetic products. Whether you’re just learning how to use and apply makeup, or you’re a long-time user, following are some guidelines it behooves all users to be reminded of from time to time.

Cosmetic Products Don’ts

Let’s start with the cosmetic products don’ts.

Don’t Share Makeup: This is a basic cosmetic products don’t that most of us have broken from time to time. But, sharing cosmetics can cause serious health problems.

For example, did you know that makeup sponges and brushes pick up bacteria from your skin every time you use them? If you let your girlfriend use your brush “for just a quick second,” then she’s in essence transferring her bacteria to your face. Yuck!

Don’t Sleep in Makeup: Cosmetic products were not made to be worn 24/7 in most instances, especially when you’re talking about makeup. Sleeping in makeup can leads to clogged pores, which in turn leads to acne, skin irritation and an overall bad complexion.

In addition to this, serious health problems can occur as well. For example, mascara: If it flakes into your eyes while sleeping, it can cause itching, eye infections and more. To avoid this, always remove all makeup before going to sleep.

Cosmetic Products Do’s

Do Wash Your Hands: Washing your hands before applying makeup will cut down on the transfer of germs to your face. You always want whatever touches your face and body to be clean. This includes your own hands.

Do Use Aerosol Cosmetic Products Cautiously: Aerosol cans are not only a health hazard, they are a safety hazard as well. Hence, they must be used carefully.

The health hazard: Because aerosol cosmetic products contain chemicals, they can cause lung damage if they are inhaled often and deeply into the lungs. Use these sparingly.

The safety hazard: Aerosol cosmetic products should never be used near an open flame. This includes smoking while “doing your hair.” Until products like hairspray are fully dry, keep them away from heat and flame because they can easily catch fire.