One of my batts (the red one) feels and sounds different than the other,,,,,,,,,,it makes a whistling sort of sound when you vape it,,,,,,,and it just FEELS more like air,,,,,,,,,,that's the best I can describe it,,,,,,,at first I thought it was just the carto,,,,,,but that carto is fine on the ohter batts I bought,,,,,,,and no matter which carto I put on the batt, it feels that way,,,,,,,,,It feels fine if I put my fingers over the tiny airholes though,,,,,,,,,is this supposed to be this way???