Why put a ball of aluminum foil in the dryer?

Putting a ball of aluminum foil in the dryer is a common home hack used as an alternative to dryer sheets to reduce static cling. The idea is that the aluminum foil ball discharges static electricity that builds up as clothes tumble and rub together, especially in dry conditions with synthetic fabrics. People typically crumple two to three sheets of aluminum foil into a ball about two to three inches in diameter and place it in the dryer with wet clothes. As it tumbles, it is said to help separate clothes, improve airflow slightly, and reduce static without chemicals or fragrances found in dryer sheets. Some users also report that it can help soften clothes a bit and reduce drying time minimally. However, results vary, the ball can be noisy, and it does not add fragrance or fabric softening like commercial products. It is generally considered safe for the dryer drum, but you should ensure the ball is tightly crumpled with no sharp edges that could snag fabrics. While not as effective as dryer sheets for some people, it is inexpensive, reusable, and chemical-free.