I used to have that problem, but I don't have it at all anymore.
Basically I use bigger nugs now, and have resinated the shiit out of my bowl.
When the bowl gets to the point where it wont stay lit on it's own, it's done, put it down and pack a new bowl. I also inhale slower.

I used to get scooby snacks and ash EVERY BOWL, but I haven't had one in months.