Author’s Note: To properly clean brushes, hold head down at an angle under warm running water. Lightly massage a gentle cleanser such as baby shampoo in the direction of the bristles (many beauty stores also sell special cleaning sprays). Rinse until no more color runs out and gently squeeze out excess water using a clean, dry towel. When finished, reshape brush with fingers into the original shape. Let air dry overnight, either lying flat or upside down.
 
SM: How can we tell when it’s time to toss our foundation?

Silva: When you see any separation within the product. Whether it’s oil- or water- based, you’ll be able to see separation between the actual pigment of the makeup and the liquid. Unless it indicates that separation is part of the characteristics of that product, replace it. 

SM: Many of us will just wait until it runs out.

Silva: Well, you can use all of your makeup up until the very end of it, but it depends on how often you use that makeup and how you maintain its integrity. Some women keep their makeup in the refrigerator and that’s going to prolong the life of it. Also, if you’re only a weekend makeup kind of person, your product isn’t going to be contaminated as quickly.

SM: What’s the lifespan of mascara?