The term CLEANSER INGREDIENT can be summarized by two crossword solutions: LYE (3 letters) and BORAX (5 letters). LYE is a type of alkaline substance that is commonly used in the production of soaps, detergents, and cleaners. It is also known as sodium hydroxide or caustic soda. BORAX is a naturally occurring mineral composed of sodium, boron, oxygen, and water. It is often used as a cleaning agent, disinfectant, and preservative.