I would recommend that you clean the ZIF connectors from this step and in Step 32 with compressed air or a soft brush after removing the ribbon. That proved to be the problem for me when after replacing my digitizer the screen had "dead" areas that did not respond to touch.
Before removing the ribbon cable, remove the screw and place one of the picks or a small strip of paper between the edge of the battery and where you removed the screw. You will probably need to use your opening tool a little to help you get the pick in place. You don't want to accidentally turn your iPad on while working on it. It can cause the backlight of your screen to be low when you power your iPad back on and then you can't see where to type your passcode (if you did not turn it off before the repair) or where to swipe to unlock your screen.
You can use a clean soft brush like a make-up brush or small paint brush to brush off the LCD.
Very good suggestion. It worked like a charm.
I know it is hard to tell from the photo, but the Wi-Fi antenna is kind of like a flap that opens on the right and is attached on the left. So if you use a pick to slide from right to left, the pick might slide under the flap and then sever how it is attached. When I had my pick just to the right of where the Wi-Fi antenna is, I was able to twist my pick a little (like you are tightening a screw) and pry the screen up where the antenna is located. Then I just moved my pick to the left of the antenna and could continue loosening the screen.
I know this is obvious, but backup your iPad with iTunes before you start. I'd also turn off your passcode if you have one.