Our sunroof barely moves. The motor seems to be weak and the sunroof jams when popping up or down into position. It is slow when sliding open and closed. Afraid I'm going to blow the motor. Do I need to remove the cable and lubricate it?

My wife just called me saying there was a loud screech coming from behind the back seat (sunroof motor). No more noise for now, but the sunroof is slower than ever. We just pop it up when in the sun. Now it needs a push to pop open and to close. I need to fix this one myself to save money. Ideas? What was the noise?