Wash whites separately, and don’t let them sit in the hamper too long before washing.
Avoid high heat, which can set stains rather than lift them.
Give the machine room — overloading it means clothes don’t get properly cleaned.
Dry in sunlight when you can; it acts as a mild, natural bleach.
None of these methods are as harsh as bleach, so they’re gentler on elastic and fibers over time — worth keeping in rotation even after your socks are back to bright white.
Bright White Socks Again — No Bleach Required