This photo shows how the effective loft changes on a 10° driver when you tee the ball higher or lower than the sweet spot.
That's a pretty dramatic change. The 10° figure is when you hit your 10° driver right in the sweet spot. The other two numbers show the loft when you hit the ball only a 1/2 inch higher or lower than the sweet spot! Isn't that amazing?
Foley goes into considerable detail about deciding how high or low you want to tee the ball. But what I found so helpful is this little statement from the end of the article:
“The highest it [the ball] should ever be is with half of the ball above the top of the driver. The lowest is with the top of the ball slightly higher than the top of the club.”That is perhaps the simplest explanation of how to tee your ball that I've ever seen. And it's a great visual to use when teeing it up: Never tee the ball so the top of it is lower than the top of the driver, and never tee it higher than half a ball above the top of the driver.
That should eliminate a lot of those mis-hits!