How long have you been using the same makeup? What about your shampoo and conditioner? Makeup does expire and salon shampoo and conditioners will break down. The general consensus of length of use for mascara is 3-4 months, eye makeup and lipstick 1 year, and any cosmetics you put your fingers into 6 months. Salon shampoo and conditioners last about 2 years. Using expired makeup especially around your eyes can result in allergic reaction or infection.
If you purchase 6 bottles of your favourite salon shampoo because it is on sale, you may not get the same performance from the 6th bottle as you did from the 1st.
De-clutter your makeup and cosmetics; and only repurchase when you are just about out. This will keep what you use fresher longer.