There's a couple simple solutions from using a toothpick and breaking it off in the slot once seated to taping them off and some have even woven thread in and out of the holes until they achieved what they felt was the right draw for them. Without it being a permanent seal those are the most effective. I actually don't even bother with it anymore including one I filled one of the air channels in and filed smooth. I like the airy draw. Mouthful of vape for minimal effort. Works for me 