Be careful you're not pressing one of the directional buttons as you try to hard reset it.

I've got a Feb 22 TP and with the plastic that the phone comes in, I couldn't hard reset it.

Edit: Tips for reach... I'm right handed so just reverse it all if you're left handed.

Put the phone in your left hand, with the top of the phone between your pointer and middle fingers... so your thumb (and the pad) is holding it on the left, and your other two fingers are holding it on the right.

Thumb on vol down
Pointer on power
Pinkie on enter

I have to lift the non-stylus side out of my palm a little bit to make it easy to reach, once you get all of the buttons, you can press the reset button using the stylus with your right hand.

I've still got 2 TP's here, but one is hard reset and ready to be returned... so I would need to set it up to snap a picture. I can if you really need.

Edit 2: Also, you don't have to hold the reset button... primarily, just be sure none of the other keys are being pressed.