choices for a glue?

I have always used the Testor's "orange" glue for model building and have been very satisfied with it. I recently got a tube of the "blue" Testor's non- toxic glue in a yard sale car kit, and am wondering if other modeller's are satisfied with this Testor's product? The tube I have does not seem to stick as well, but then I am using it on a truck kit I mentioned in another post, and there is a lot of glue residue from another brand of glue, and the plastic of this kit seems a bit stiff or maybe brittle(?)... I realize plastic should not change but I wonder if it can change slightly with age? In other words, I have always liked the Testor's brand..... I know the truck kit is older....I wonder if maybe the glue is maybe old, too...  how does the Testor's blue compare to the orange, in your opinion?