Clean Well botanical hand sanitizer The active ingredient in CleanWell products is Thymol, a component of thyme oil. Thymol has been clinically proven to kill over 99.9% of common house-hold germs, specifically - Influenza A, Rhinovirus, Staphylococcus aureus, Salmonella enterica, Pseudomonas aeruginosa, and Esherichia coli. We never use any synthetic chemicals or preservatives - all of our ingredients are derived from botanical-based components and natural essential oils.