Mike - you may wish to look into the threads on Lipton Pyramid Tea Bags. Haven't tried it on my njoy, but can't imagine it wouldn't work. Just pull out the material in the cart and replace it with the Lipton Pyramid Tea Bag material and if it's like my other units it'll draw better, easy to wash out and dry and they'll last...uh..forever I suppose.
I didn't have any pyramid bags on hand in the house today, but I did have some old Lipton teag bags from way back when (just the regular ones). After a little trial and error getting the tightness of the roll correct, I modded a couple of my carts with the tea bags. It seems to have beaten the leaking issue. I get a decent amount of vapor off of a slight draw, and the slight draw keeps the liquid inside rather than in me.
So it seems to be well.
Thanks for the tip.