This document discusses the difference between expiration dates and best before dates on cleaning products. It notes that expiration dates indicate the last safe use date, while best before dates refer to when efficacy and fragrance start to diminish. Common cleaning products like detergents, dishwashing soaps, baking soda, and vinegar are listed along with their typical shelf lives, ranging from 6 months to 5 years depending on the product and whether the container has been opened.