The Boston Advance cleaner needs to be used as part of a two-step process. First, you should use three or four drops on the lens and use the pad of your finger to rub both sides of the lens for at least 20 seconds. This cleaning solution will rid your lenses of any dirt that may have accumulated throughout the day.
Then, a disinfecting solution must be used to rinse the lenses, such as Boston Advance conditioning solution. At the end of the day, after cleaning with the advance solution, you can use the conditioning solution to soak the lenses in your lens case overnight, leaving your lenses clean, clear and ready.
The Boston conditioning solution can also be used as a wetting agent for increased comfort before applying your lenses in the morning. You must discard these solutions 90 days after opening.