Cleaning solutions are products used to remove dirt, dust, and other debris from surfaces. The two crossword solutions for the term 'cleaning solution' are BATH and LYE. BATH is a four-letter word that refers to a liquid used for washing or cleaning, usually with soap or detergent. LYE is a three-letter word that refers to a strong alkaline solution, typically sodium hydroxide, used in making soaps and detergents.