I can't take credit for this, found it on a U.K. site, but here it is, I just tried it, it works quite well, enjoy:
Take a 510 cart, pop the end cap off with a pin(i prefer to use my teeth, just bite down on it and it'll come off) inside there's a pastic ring with an hole in it, pry this out with the pin.
If you look inside there's a ledge that runs from 1 end of the cart to the other, this cant be taken out unless you drill it. Make sure the cart is aligned with bowl in the atty, then drip 2 or 3 drops down from the top. Drops will hit the ledge and drip down, the contoured shape of the cart at the bottom will ensure the liquid hits the bridge or the bowl in my case. Takes 2 minutes tops
Take a 510 cart, pop the end cap off with a pin(i prefer to use my teeth, just bite down on it and it'll come off) inside there's a pastic ring with an hole in it, pry this out with the pin.
If you look inside there's a ledge that runs from 1 end of the cart to the other, this cant be taken out unless you drill it. Make sure the cart is aligned with bowl in the atty, then drip 2 or 3 drops down from the top. Drops will hit the ledge and drip down, the contoured shape of the cart at the bottom will ensure the liquid hits the bridge or the bowl in my case. Takes 2 minutes tops
