The below is the most common remedy for leaking clearomizers/tanks or clearomizers/tanks which are not producing any vapour:
If the battery appears to be working fine (ie if the button lights up as expected when pressed), then it is possible some liquid has gone down the central part of your clearomizer/tank or the coil has been flooded (usually by drawing/sucking too hard). If you think this could be the case, please try the following: unscrew the clearomizer/tank, place a tissue where the battery was and blow into the mouth piece a couple of times. If there was any e-liquid in the centre pipe or if there's an excess of liquid inside the coil head, this should remove most of it. Now screw it back on and try it again.
Please note: another issue which can cause a connection problem with the battery is the over-tightening of the battery with the clearomizer/tank. If you try the above and it does not work, try loosening the connection between clearomizer/tank and battery slightly.
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