Meguiar's® advanced Re-Fresher technology not only removes unwanted odors wherever they hide, but also replaces odors with a pleasant new car scent that lasts for weeks. Meguiar's molecular odor eliminating chemistry works great at permanently removing smells like cigarette smoke, wet dog, work-out gear and more. Meguiar's® Re-Fresher technology permanently removes existing bad odors through chemical bonding at a molecular level.