I had an atty go bad this morning so I tore it apart to see how it was made. Part of what I was left with was a bunch of "steel wool" I know its not made out of "steel wool" , but something like it. I thought of your post about the coffee filter in the drip tip and rolled up the "steel wool" and insereted it in my converted cartridge. I have been using it all day and its been working fine. I can add 6 drops instead of 3 without flooding the atty. Where can I get some more of this wick material besides tearing up more attys? Why don't they use it instead of the normal cartridge material? I would guess cost would be why.