The following information on this page represents what you need in order to maximize the life of your pool liner. There are other methods that are also viable as long as they don't expose your liner to excessive amounts of chemicals which can harm the liner in as little as one application. The primary cause of liner failure is neglect. Put your pool on a care schedule and stick to it throughout the year. By the time a liner begins to show signs of improper care, it is usually too late to restore the liner to it's original condition.