I'm sure I've said it before but I always get some leakage after refilling.
I always take my Odysseus off my mod and refill, then stand it on some paper towel for 30 to 60 seconds, I think about 5 or so drops comes out.
I then give it a suck and put back on my mod, vapes perfect till next refill.
I take it off my mod because I dont want the juice dripping into the adaptors.
To minimise wastage on refill, what I did was I will close off the juice control and vape till my wick is almost dry (can tell by the slight burnt taste), then refill. After refilling and screwing on the top cap, I will tilt my odysseus horizontally 90 degrees and start to 'suck' a little. This is to allow the the liquid that has collected at the center post to flow to the dry wick.
This method helps me save a little on the wastage of liquid.