If it's made of chip-board/particle board/press-board (small chips of wood held together with glue) and they are wet for regarding green few hours they absorb water, expand, and lose their structural integrity. Check to see kind of of supplies they suffer from. http://Bobwinegard.net/__media__/js/netsoltrademark.php?d=www.avian-flu.org%2Fbbs%2Fboard.php%3Fbo_table%3Dqna%26wr_id%3D2806046