I just bought some flavor west key lime and made some vapes from it. However I notice that as I vape the flavor changes and it no longer tastes like Key Lime. It's like as I vape it becomes concentrated or something and really starts to taste off. The colour of the juice in the tank becomes darker after a while and this is when it starts to happen. To get the original taste of the key lime I need to replace the coil on every tank filling. This is not the first flavor I have seen do this. Anyone know why this is?