Within 30 minutes.

Baking soda is a commonly used detergent that can be used to soak clothes. The time for soaking clothes in baking soda should be limited. It is recommended that clothing be soaked in the baking soda solution for no more than 30 minutes. Prolonged soaking can cause damage to clothing or color fading. The specific soaking time also depends on the material of the clothing and the degree of stains. For more dirty clothes, the soaking time can be extended appropriately, but care should still be taken not to exceed a reasonable range. After soaking clothes, wash and rinse them promptly to ensure complete removal of baking soda residue and stains.