Boston One Step Liquid Enzymatic Cleaner is a simple and convenient way to remove protein deposits from your rigid gas permeable contact lenses. Designed to be used directly in your lens case while disinfecting, this cleaner eliminates the need for enzymatic tablets and separate vials. The clear, odorless formula is preservative free and helps maintain contact lens wearing comfort. Item contains a 15-week supply and is for use with all Boston Conditioning Solutions: Boston Original Conditioning Solution or Boston ADVANCE Conditioning Solution. To use, after daily cleaning with Boston Original Cleaner or Boston ADVANCE Cleaner and rinsing, place lenses in lens case and fill to top with any fresh Boston Original Conditioning Solution or Boston ADVANCE Conditioning Solution. Detach one single-dose unit and squeeze container to release 2 drops of Boston One Step Liquid Enzymatic Cleaner into each lens well. Soak lenses for 4+ hours or overnight to ensure proper cleaning and disinfecting. After removing lenses from lens case, rub and rinse lenses for approximately 5 seconds with any Boston Conditioning Solution to ensure that the enzymatic cleaner is thoroughly rinsed off the lenses. Apply fresh Conditioning Solution to wet the lenses for additional conditioning, if desired, and insert. For full instructions, see information printed inside the product carton. For fluoro silicone acrylate and silicone acrylate rigid gas permeable contact lenses. Not for use with soft (hydrophilic) contact lenses.