When my vapor production gets too low I first try swapping out or charging my battery and dripping more juice into the carto I'm using before, and when those things don't work it then becomes clear that the carto has given up the ghost. By that time though I have wasted up to a carto's worth of juice to fill what I now know is a dead carto. On the flip side, I don't want to discard a carto before making sure it has no life left in it because I don't want to be wasting a still good carto either.
Is there any way to avoid this wastage of juice? Or is that just a necessary evil?
Is there any way to avoid this wastage of juice? Or is that just a necessary evil?