I didn't see any plastic clips on mine. Nothing melted. I've had it for about six months, used it pretty much everyday for meat & vegetables, sandwiches. It was my only means of cooking in my camper. Sorry I am not able to help.
Hey, the clips are metal now. I just received my griddle today, 3/5/2013. I took a picture. They seem pretty sturdy. The plastic clip complaints almost made me not buy this, but I saw a few people say they had metal, a few say they had plastic (in 2013) so I rolled the dice..