According to the search results, salt can be used in the toilet for two main purposes: to unclog it and to clean it. To unclog a toilet using salt, you can pour a cup of rock salt into the toilet bowl and let it sit overnight. The salt will break down any material, such as grease and debris, and you can flush the toilet in the morning. Salt can also be used to maintain a clean and clog-free toilet. By pouring a cup of salt into the toilet bowl and letting it sit overnight, you can effectively break down minor clogs and prevent future ones. The salt works by softening the debris, making it easier to flush away. Additionally, salt acts as a natural deodorizer and absorbs foul smells, leaving your bathroom smelling fresh. Salt is an eco-friendly and cost-effective solution compared to chemical drain cleaners. However, its important to note that salt is effective for minor clogs only, and its not a substitute for professional plumbing services for severe issues.