Well I've been filling my own carts for two days and I've found out that the condom method is easier but you end up with carts that leak more and you get juice in your mouth etc... The syringe method takes a little more but you saturate the wick better and no leaking carts. It seems with the condom method that the juice travels up through the center and around the cart wick instead of saturating it as well. I guess you could let them sit a wile to give the fluid time to soak into the wick??? Waddya think?