There is a reason your skincare should be applied in a certain order. The proper way you should apply your skin care is based on the molecular structure of your products. The rule-of-thumb I like to go by is layer your products from lightest to thickest. Another rule I like to follow this rule with is always apply your SPF last before you leave in the morning. At night, always apply your facial oil last in the evening before you go to bed. When all of your products are in the right order, you will notice a huge improvement with your skin's hydration levels, texture and your skin care products will work much more efficiently.