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Cleaning your makeup brushes is extremely important because dirty brushes can cause acne on your skin. Furthermore, unclean makeup brushes contain a number of nasty oils, dead skin, product buildup and bacteria buildup.
Seeing as how none of us want oils and dead skin being put back on our face, it's worth going over some of the different ways to clean your makeup brushes.
So here are the ins and outs of cleaning your cosmetic brushes and making them last for years.

Once a week (or more) you should give your brushes a good wash so they don't have bacteria-build up, which, as we discussed at the outset, leads to acne breakouts. There are a few different ways to clean and maintain the health of your brushes, including using olive oil and a paper towel, a sponge, or the palm of your hand. After each use of your makeup brushes, wipe them off with an antibacterial wipe; this is best for brushes that come in contact with liquid cosmetics.
It's ideal to wash your brushes every time you use them, but most of us don't have time for this. So just make sure you wash all of your makeup brushes at least once a week like we mentioned before. Your eyeliner and eyeshadow brush might need more attention because they come in close contact with your eyes. If you have sensitive skin, you may want to have two foundation brushes so that you can put them into a rotation. This way, you can use one when the other is dirty, and clean them both together once a week.
One very effective way to get your makeup brushes clean involves using olive oil.
There are also makeup brush cleansers available for purchase, or you can make your own. You can even skip the olive oil, and just use the shampoo if you're worried about the oil being left on your bristles.
White vinegar is also an option for cleaning your brushes, and here is how you do it!
Avoid using hot water on your makeup brushes because it can cause them to frizz. You can also leave your brushes sit in the mixture bristles-down, handle-up for a few minutes before working the product out.
After you cleanse your makeup brushes, re-shape them into their natural shapes while squeezing any of the excess water out of them as you do so. Then lay them on their side on a towel to dry. This could take all night or longer, and it's a good idea to wait to use your brushes until they have completely dried.
You might even be tempted to use a blow dryer to speed up the drying process; however, this is a really bad idea. You don't want to use a blow dryer because it will cause the bristles to become frizzy and shapeless. Instead, try using Sigma's Dry n' Shape since it will help dry your brush while also holding the brush's shape.
Above all, make sure your brushes are clean because doing so will help keep your skin clear of pimples and other skin problems! And keep in mind that you don't have to create your own makeup brush cleanser at home. After all, there are plenty of makeup brush cleansers available for purchase online, at your beauty supply or in drugstores.