ReNu® Multi-Purpose Solution is our original formula. It is a time-tested formula for cleaning, rinsing, disinfecting, and storing your soft contact lenses. ReNu® Multi-Purpose Solution requires use of separate enzymatic cleaner for protein removal. Because your eyes are so important®, don't experiment with just any brand. Different solutions may not be compatible and not all solutions are safe for all lenses. Always follow a proper cleaning/disinfecting regimen and lens-wearing schedule and make regular visits to your eye care professional. Be sure to consult your eye care professional if you have questions about lens care.