I bought one of the large grooved cutting boards last December during a show I hosted (before I became a consultant). It's become warped and bows up in the middle (w/the grooved side up). The grip-net pad doesn't even touch it, let alone keep it from slipping. Does anyone know if this would be covered under the warranty? I would love to be able to show this at my shows, but I'm way too embarrassed to bring it in the condition it's in.