When you refilled it, did you close off the airholes and tilt it onto it's side or leave it upright? I've heard the "trick" is to lay it down on it's side, close the air, and not fill it too much. Dunno, I'll play around with mine when it comes in on Monday.
Yes I closed the airflow, titled it a bit, but not all the way on it's side.
I did rewick last night with more cotton, and so far is working good with no leaking, and have refilled once.
Also saw someone say, put your finger over the drip tip while filling too, so will be doing that in future.