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I had same problem when first got mime. Hitting a lot of high loopers off the crown. I started experimenting with moving ball forward in my stance and it worked for me.
I've always been a more 'forward' position guy. It seems to be more related to actual playing on course vs. the Range. If I tee it up at the same height on course as it is on the range, it goes to the 'high face'. I'm guessing it has to do with the Range mats being "firmer", with on course conditions being 'softer' so the low point is just *that* much lower. Once I finally remember that, I can lower the tee a bit and I can find the middle more. Now to work on the toe/heel misses!