The scales are glue to the blade with 2-part adhesive/epoxy. The resin+hardener must be properly mixed in order to catalyze curing. If they are not properly mixed, you will end up with a sticky mess that does not all cure and adhere, the sticky mess will last as long as there is still goo remaining between the scales, that goo will not readily dry.
Idea: is there any flex to the scales? I mean, can you, through application of firm pressure, cause the goo to squeeze out of the spot? The scales should be bolted tightly to the tang such that there isn't space between for goo to ooze out, it should have all oozed out on the initial construction of the knife. Oozing goo indicates that something may have prevented a tight seem between the tang and scales - deformity in the surface or an obstructing hair or other material.
If you can bear to be separated from the knife, I'd recommend contacting BRKT and having it sent back for warranty service - they may need to clean under the scales and re-adhere new ones...