I inserted a floppy disk into my (recently resurrected) Plus' internal floppy disk drive, the drive then made a short "humph" sound, and thereafter died ...

After manually ejecting the disk with a pin, further attempts at inserting a floppy are greeted with no sound or movement or more "humph" sounds whatsoever. Methinks it is dead.

Here's the youtube video: http://youtu.be/E9r6pXpyR6w

What should I do? Take apart the Plus and clean the drive (by following these awesome instructions over at:

http://www.vintagemacworld.com/400kflop.html)?