I dug out my old esbit tablets (about 5 years old but sealed)

Using the mug and stove made by esbit - 1 14g table didnt really boil 400ml of water - there was a bit of a breeze BUT i think the tablets are too far away from the mug and by the time the tablet has burnt halfway down its next to useless. Was reading on some forums how people manage to boil 3 cups of water on 1 tablet - thats about 700ml - cant see how they manage it unless they have much more efficent set up than the one designed by esbit - or my tablets are past their best...

Any thoughts, much appreciated.