Hi! I have a king size rice bed that I purchased around 10 years ago, from frequent moving and redecorating the posts have become loose/or stripped. Where each post connects to the headboard & footboard there is a threaded screw to attached each to the four corners of the bed, these will not tighten anymore. How do I correct this problem so that I do not have wobbly posts? Your prompt response is appreciated. Thank you, Nicky