Hair-permanent solution stains can appear months later: Georgia Extension recommends a 15-minute warm-water, detergent, and vinegar soak, followed by rubbing alcohol and washing

Home perm kits can leave unexpected yellow stains on your clothes, even months after application. These discolorations occur due to sulfur compounds, such as ammonium thioglycolate, present in perm solutions. The chemical properties affect not just hair but also fabrics. To tackle these persistent stains, soaking in a mix of water, detergent, and vinegar can be effective.