Detailed answer

When makeup brushes are not cleaned regularly, they accumulate bacteria, oil, and dead skin cells. When these dirty brushes are used on the skin, they transfer these impurities onto the face. The bacteria can then lead to infections and breakouts, while the oil and dead skin cells can clog the pores, resulting in blackheads and whiteheads. Regularly cleaning makeup brushes is essential to maintain a hygienic skincare routine and prevent clogged pores.