I'm a week into vaping and only have 2 tanks (more on the way). I'm using the Halo Triton top coil wicks. Being so excited with all the different flavors I bought about 20 different ones. So my question is I've been washing out the tank and wicks, let them dry and fill with new flavor. Do I have to wash between each flavor change or can I just empty out any juice left and fill with new juice? Obviously I would keep the tobacco with tobacco and citrus with citrus. Will the old juice taste go away after a few puffs?