Last summer I built a dresser out of white oak. Just recently the 3 pieces I used on the top started to separate.
The gap between 2 of the pieces has opened up to about an 1/8 of an inch. On the underneath side of the top
I placed several clete which I both glue and screwed to the top to avoid this happening. Could a more experience
woodworker tell me where I went wrong? Is it the dry winter air that is causing this or is it something else? I'm
not sure what to do to correct this and I surely don't want to have the same thing happening to future projects.

Thanks in advance.