Paper will not feed into machine

Most likely the sensor in the insertion area is not recognizing a paper when you try to insert it to be shredded.

Try to clean out the gears, and oil the grinders.

Clean around the insertion area to remove any debris from around the sensor. (Be sure to turn it off/unplug it first!).

If you can remove the shredder head/grinders from the body of the shredder box, turn it upside down and clean it that way as well.

Sometimes the little pieces of paper get clogged up inside the gears.

I got some of the dust spray with the straw...inserted the straw deep into the shredder grinder/gears and sprayed.  I got tons of stuff out.

My motor/grinder worked perfect after I did all this.

Good luck!