Genesis users this question applies to, do you get a lot of juice build up inside the top cap and all over the top deck, everytime i pull the cap off to fill i get juice dribbling down the outside of the tank and its doing my tree in - im going to take a wild stab in the dark and say my wick and coil are not performing well enough and its spitting juice around.
Apparently the liquid can flow down the centre of the wick (if you use a straw-style wick) and leak out the top.