Xeon, I'm experimenting with G2BG for a lace base, and the hairline is finicky, but the past few times it finally seems to have worked. I mix the glue and spray in a small container, stirring it up good, and letting it sit for 5 or 10 min. It becomes a glue-like consistency. Then I dab it on the hairline with a small paint brush. In around 30 sec it feels quite tacky to the touch and then it's ready for the unit to be pressed down. This seems to be different from what people generally do but give it a try and see if it works any better. i could have just gotten lucky, who knows?