First thing I did with this was take it apart. Take all the screws out and get it into as many pieces as I could.
I then had to carefully pry each one of those board apart on top. If I would have left the ones that were still hanging on, they would have broken down the road. This was a VERY necessary step.
I pulled each board apart carefully so I didn’t break any boards. I sured a small flat head to make an opening, and then push a pry bar into the crack and slowly pulled. The glue wasn’t all that strong anymore so it didn’t take much.
Once I got it all apart, you could see why it was breaking. There was SO MUCH FOOD in-between there! GROSS! I cleaned each board really good, and then sanded each one until it was fresh wood again, making sure to remove all of the old glue.
Then, one-by-one, I began to glue each board back together. I used Elmers Wood Glue and two 48 inch Bar Clamps to hold them in place, one at a time, for 24 hours each. These boards were still a little bowed, and since I don’t have access to a planer to straighten them out, I just sanded until I got them close enough, and then used lots of glue and made sure they dried for at least 24 hours.