Some times Nexus 7 2013 touch screen goes all crazy. Here is the fix. It's an easy hardware fix. I think it's caused because of loose connector. Apply this and let me know if it works for you.

PS: some times moisture on the glass also makes touch digitizer go crazy. I'd just wipe with my shirt/tissue paper and then everything is normal again.

Update: 30/05/2015: It's been 5months since I've done this. Never actually had serious touch issues since then. But some times touch gets unresponsive.
I opened up the panel last week. I noticed two small foam pieces on the bottom of the panel similar to the top. I've stuck a piece of cardboard on them too as I did with the top ones in the video.
I can definitely feel touch is now more responsive and not once I noticed phantom touch issues since then. I'll keep this updated in future if I find any.

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