the filler in the stock carts don't "wick" as fast. so dripping obviously has the most liquid in the atty w/out flooding it.
www.striclyejuice.com sells blue foam already cut into the perfect size squares, u fill up your cart almost to the top, then take some tweezers(they have them at the site too) and compress it, then put it in the cart, flush with the top. take the cart and tap it on a paper towel a few times to make sure its not gonna leak. this seems to work the best for me, and its an awesome improvement when ur on the go, or in public, and dont want people looking at u like ur dripping ur drugs into your dope
device or something