I know I do not post very often but thought I would share this with you. I was experimenting last night and found a very simple and beneficial extra step when filling a blank coolcart using the drip method(remove white cap and drip liquid onto the filler). I would assume it would also work on a WOW Cart. One of the things I have always hated when filling a blank cart is that you have to let it sit for a while. Then the spin was invented. This was good for shortening that time as well as increasing cart capacity but there was still some waiting involved. So I tried dripping 1 drop down the center hole of the battery connection end and sitting the cart mouthpiece end down for 5-10 seconds. It worked ok but still had to wait a little. I tried two and after that 5-10 seconds I blew through the battery connection end gently and then tried it. SUCCESS. I could use the cart immediately and it tasted perfect. So for you drip filler method users give it a try and see if you receive the same results.