Detailed answer

Expired makeup products can be a breeding ground for bacteria and other microorganisms. When applied to the skin, these products can clog the pores and lead to the development of blackheads. Additionally, expired makeup products may also contain ingredients that have lost their efficacy, making them less effective in controlling excess oil production and preventing clogged pores. It is important to always check the expiration dates of makeup products and dispose of any that have expired to minimize the risk of developing blackheads. Regularly cleaning makeup brushes and sponges can also help prevent bacterial growth and reduce the likelihood of clogged pores caused by expired products.