Use a 15 degree wobble extension and a new socket (new socket is optional but I always had better luck, I used to trade mine into the Snap On truck after every 10 HG jobs). Mark the head with white out so you can tell when you get the 90 degree angle. (both times)

 

@Bkreutz


Thanks for the tip....any special socket? Right now I am using a 6 point impact socket....I will have to find a 15 degree wobble extension. The white out is a great idea!

Thanks again!