Straightening particle board panels

This is just a suggestion. I'm sure that there will be some others. I have had good luck taking the warp out of wood sheet this way. Mix some ammonia and water (1 part ammonia / two parts of water) into a spray bottle. Spray (you can use a sponge also) as much of the warped area until the panel shows that it soaking up the solution. Lay the panel on a flat surface wet side down (preferably on hot concrete walkway or patio) and put a sheet of wood, thicker than the panel on the panel and add weights to completely hold it down. Let it dry that way completely, maybe a day or two. It should take set.
Norm