The term 'Cleaning Challenge' refers to a task that involves removing stains, messes, and GRIME. The solutions for this challenge are STAIN (5 letters), MESS (4 letters), and GRIME (5 letters). This challenge requires the use of cleaning products and techniques to remove dirt, dust, and other debris from surfaces. It is often used to clean up after a party or other event, or to restore a home or office to its original condition.