Thanks Eclypse! I'm a bit challenged on following directions, but your pics helped a lot.
I had problems right from the start with the filters that came with my carts, getting loose pieces that stuck to the atty and gave a burnt, horrible taste. I tried PTB and it leaked and didn't work too well. I bought batting and found the same problems with plastic taste, ick! I've been so frustrated and aggravated by available filter material.
I sent hubby over to PetSmart tonight and have tried your method with the addition of a straw. Hubby is trying it without the straw. We're going to compare notes and decide which works better for us.
So far, I think I'm winning.

No horrid taste, great vapor, works quite a while before I have to add any liquid. Hubby ran out of liquid 2x and I was still toking on the same liquid. (It's possible he's hitting it harder than me.)
Again, thanks for the great posts and pics. As a newbie, I really appreciate the time and effort you have put into this and other threads.
Debbie