• The Liquid Cleaner - 2-3 years, unopened.  Once it is opened, it's shelf life depends on how you are using it.  If you are soaking your dirty items in the 4oz. container where the dirt and grime break off into the liquid, you will need to replace your liquid about every 9 months or so.  Just toss the cleaner, wash out the container with some soapy water, rinse, and refill with new cleaner. • Tarnish Remover & Polishing Cream - 2-3 years.  If it becomes dried out and hard, add a splash of water, about 1-2 tsp., and put it in the microwave for 5 seconds. Repeat in the microwave until it "melts" and can be stirred with a fork.