Soak clothes in warm water + 1 cup baking soda for 1–2 hours
Then wash normally
Important tips:
Works best on white cotton and light fabrics
Avoid overusing on delicate materials like silk
Don’t mix excessively with strong chemicals
Bonus trick:
For even brighter results, combine baking soda with a little white vinegar (added during rinse cycle—not at the same time)
It won’t turn old yellow clothes pure white instantly, but with regular use, it noticeably improves brightness and freshness.