I have two suggestions that you might try. From my experience with Ghostbond, always shake the bottle (hard!) for about a minute before you use it. Then when I'm finished I always turn the bottle upside down and place it in a paper towel roll that I've cut in half. (a toilet paper roll works too). I don't know how these two things make such a difference in the bond, but they do.

I also let each coat dry from 7-10 minutes before applying the next coat.

Sidney