Thanks for all the suggestions. I did not clean the panel, just removed the manufacturers protective plastic overlay sheet. I probably should have used an alcohol cotton swab first. I also used an extra piece of Scotch tape across the cable going to the emitter. That seemed to help a great deal - keeping the weight of the 6-foot cable off the emitter.

I keep forgetting about hot melt glue being removable. If they come off again, I will clean the front panels and use hot melt glue to put them back in place.