I have had this derasa clam for a little over two years with few problems. However, over the last couple of months, it has begun falling over most nights. i normally right it each morning and it is fine during the day but will fall over again when the lights go out. I'm not sure why it has started struggling with its equilibrium and not sure how to keep it upright. It is on the sandbed and always has been. Any advice is appreciated. By the way, it still opens fully while standing up and even attempts to while on its side although it looks a little odd. I'm just afraid of the stress this could cause long term.