Stashu,
You can straighten it out, but you're going to need a completely flat surface to do it on. If you have a mirror you can use that would be good because glass is usually completely flat. Anyway, wet the wood of the elevator, lay it on your flat surface, cover it with a sheet of plastic (so the water won't soak into the next layer), and then lay a stack of books on top of the plastic sheet. Now leave it there until the wood is completely dry. When you take the elevator out of the stack it should be flat now.

Hope this helps

Ken