I was trying to get one emptied in a hurry today, to let a friend try the RY4.
It was a brand new Vanilla, which I don't care for a whole lot.
I basically just stacked up a couple napkins, popped the cap and inner silicon piece,
like I was about to fill it... held the cart over the napkins, battery end down... and blew.
After about a minute of this, the vanilla stopped coming out, and I refilled as normal with ry4.
I suppose I'd take more care and time, if the flavors weren't as complimentary as I think
vanilla and ry4 are... but it certainly worked, in a pinch. I managed to get 17 drops in.
Just a thought.