If anyone doubts that ecigs are tar free, they can do a simple test. Take a long drag from the ecig (don't inhale it) now place a white kleenex over your lips and blow the vapor into it....nothing will appear discolored. Now take an analog and do the same thing....you will see a brown discoloration. This is the tar that goes into your lungs. Tar can only be created when combustion takes place and since e cigs do not burn, they are tar free. Think of tar as creasote that lines your chimney pipe.