Some people have posted, suggesting that you can use a straightened paper clip, and poke a hole through the center of the carto fill, and that would give a more airy
vape.
Here's what *I* find works really well....
When my cartos get tough to take a draw on them, when it feels like you're trying to suck a bowling ball through a straw.... I TOSS 'EM!
buy them in moderate bulk (15-25), and they're all of what? $1.25? $1.20?
I just purchased 25 Boge 3.0 cartos, for $28.02, including shipping, from VapeLite. (I used code GET5FOR504 to bring price for a five pack down to $5.04)
That works out to $1.12 ea.
Hardly pays to bother cleaning 'em. (I used to drop $5-7 on a pack of smokes without giving it a second thought)