AQUASOFT ASTEK 4 Solutions offers you a rub-free cleaning option in which case you need not rub the lens as instructed. However, you must rinse the lens thoroughly and soak it for at least six hours. The option is best used with frequent replacement lenses. Dual-Disinfection System. Uses A Lubricant Found Naturally In Your Eyes. Matches The Ph Of Healthy Tears. Utilizes The Eye's Natural Lubricant To Deliver Long Lasting Hydration. Helps To Maintain The Eye's Healthy Tear Proteins Active. My Aqua-Soft Solution Conditions, Cleans, Removes Protein, Disinfects, Rinses And Stores Soft Contact Lenses Including Silicone Hydrogel Contact Lenses.