… when it comes to sharing makeup. Don’t do it, not even using your own tools. If someone has an eye infection or suffers from cold sores and her cosmetics get contaminated, that you dip your own brush into a product will not prevent the spread of those germs.
Makeup Counters
There are women who wouldn’t think of allowing a stranger to use their cosmetics, yet they will happily indulge in makeup counter samples. This is sharing of perhaps the worst sort. Almost all of those shared products are likely to be contaminated with something undesirable. Never put any of those products on your face. If you want to test them, do it on your wrist or the back of your hand, and afterward, make sure to wash your hands before they come into contact with your face again.
Saliva
Do not allow saliva to get anywhere near your eyes. Some women will thoughtlessly lick their fingers and wipe their eyebrows, attempt to keep eyelashes clump-free or to remove unwanted makeup from their eyes. Saliva contains bacteria and such practices are essentially begging for a problem.
Contact Lens Wearers
People who wear contact lenses need to be more careful than other cosmetics users because items can get trapped against the eye and increase their risk of infection. Always put your contact lenses in before you put your makeup on and remove them after you have removed your makeup.