Dripping from the bottom is more a factor of how you fill vs a carto being full. I hold a tissue against the
threaded end hole with my finger, tilt a carto and add 18 drops per ml of capacity, dripping as slowly as necessary down the inner wall of the carto into the stuffing while rotating the carto. Then I wait 20-30 seconds. Then I slowly add however many more drops it will soak in easily. Then I clean up the
threaded end, air channel if any (puff into threaded end with poene nd down toward a tissue) and while still pointed down I touch soft tissue to the top of the stuffing to sop up excess.