Why Keeping Skincare and Cosmetics Cool Matters Heat can cause many skincare and cosmetic products to break down faster. For example, creams and serums may separate or lose their consistency. Makeup, such as foundations and lipsticks, can melt or change colour. This affects how well they work and can even cause skin irritation. Keeping your skincare and cosmetics cool in hot weather helps maintain their texture, scent, and effectiveness. It also extends their shelf life, savi