Is there any chance that moisture had gotten on the device. Touch screen devices will act like they are going haywire if there is moisture on the screen. You can also do the reset by turning off the Vita, then hold power, PS, and R together for five second. that will do the safe boot up just like power button for 30 seconds.
#1XBOX #2 PSV #3 ps3 thumbs down. Shoo fly don't bother me!