Solution -> For stubborn stains or dinginess, soak white clothes in a solution of oxygen bleach (like OxiClean) and warm water for a few hours or overnight before washing as usual.
Explanation -> Oxygen bleach is a gentler alternative to chlorine bleach and is effective at lifting stains and brightening whites without damaging the fabric.
any notes required -> Follow the product instructions for the correct ratio of oxygen bleach to water.

Soak whites in a solution of oxygen bleach and water before washing.