Decaffeinating teas is easy and free! Here's how to do it: steep a teaspoon of tea leaves for just thirty seconds in five ounces of heated water, then discard that first cup of brewed tea. In doing so, you will eliminate upwards of 80-93 percent of the caffeine. Using the infused leaves, add heated water again, and steep again, this time for three to five minutes, or longer to taste. You will have a satisfying cup of tea with only 7 to 10 percent of the caffeine, a very very modest amount.