Dave Plowman (News) formulated on Monday :
A drill sharpener that worked well for idiots would be one of my first
purchases. ;-)

It seems to be almost idiot proof, apart from the setting up in the
clamp/ holder. It gets the basic angle about right, except sometimes it
seems to not get the angle right for the none cutting edge/ the
clearance angle.

I used to be able to make a pretty good job of grinding them by eye.