Suffering arises when the mind becomes too "sticky" to the sensory "foods" (five sensors and their respective stimuli). The practice of Insight meditation will help us to "let go" of these "foods" with ease. The contemplation of the three characteristics (impermanence, suffering and non-self) is the key to it's success.
I guess that is why it is called "Crazy Glue" (Crazy=delusion)!
craving is "the glue"