Thanks to all but Retired Guy & Village Tinker had the answer.
I found the tiny glass sensor that is in the middle of the paper insertion slot. It's so small I needed my flashlight to find it.
I took a Q-tip and sprayed one end with Windex. Then I wiped the wet end over the tiny glass sensor (it barely fit in there). Then I did the same thing with the dry end of the Q-tip.
SUCCESS!!! Thanks to you all for saving a perfectly good shredder.
My house is ghost free.
