My Note2 and original Galaxy Nexus both have screen burn in. Both from the Waze app. I use my phone as my car gps, so Waze runs anywhere from 2 to 5 hours a day, depending on what jobs I have that day.
Might be able to use a toothpick to pull it out. Slide it into the hole that the spring is supposed to go into. If it's too small, split the tip with a knife to widen it out.