Yes, it is generally not recommended to leave clothes soaking in detergent for many days. Doing so can lead to several issues:
Damage to Fabric: Prolonged soaking can weaken the fabric and lead to discoloration, especially for delicate or brightly colored garments.
Foul Odor: Clothes left soaking for an extended period can develop a musty or sour smell, making them unpleasant to wear even after washing.
Detergent Residue: Leaving clothes in detergent for too long may cause detergent residue to build up, which can be difficult to rinse out and may irritate the skin.
Stains and Discoloration: Some detergents contain enzymes that can break down stains and soils, but leaving clothes in the detergent for too long may cause these enzymes to work on the fabric itself, leading to discoloration and damage.
Mold and Mildew Growth: If clothes are left wet and soaked for an extended period, especially in warm and humid conditions, they may become a breeding ground for mold and mildew.
If you need to soak clothes to treat stains or heavily soiled items, it is best to follow the instructions on the detergent's label or use a stain remover specifically designed for pre-treating garments. In general, it's best to avoid leaving clothes soaking for more than a few hours to prevent potential damage and ensure they remain fresh and clean.