If you enabled USB debugging before the touch stopped working, you can use "adb tap x y" commands to get around and wipe it. I'm not sure how flashing recoveries works on this phone yet, but if it doesn't require you to use the screen, you can do that and wipe from there.
If you have a swipe lock screen enabled, you can use "adb swipe x1 y1 x2 y2".
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LG G2 - Stock ATT 4.4.2
Atrix HD - Stock ATT 4.1.1