Why won't the cover of my MacBook Pro Retina 13" 2013 come off?

Question

macbook

Unscrewed the screws - approx. Further along the edges, the back cover is lifted with a fingernail, but it is not removed, as if in the center, approximately under the touchpad, it is glued. Why is that? How to withdraw? Can you pull? What to do to withdraw?
I want to disassemble in order to blow out the dust and remove the hull squeaks.

Answer 1

These questions are answered by the guys from ifixit
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Answer 2

There are seals all around the lid. So they soften over time from heat and just stick. Slowly pull back on the cover and it will pop off.