I have a Smeg microwave oven model SC45MCSG2 and the long bar type handle has come loose it seems to be held in place by a single screw on each end. The screw comes from inside the glass oven door and into the handle but i cannot see how to get to the screw it seems that you would have to remove the inner door case to get to it and i can't see how this comes apart. Can you help please.