Kept on getting a ghost on the images taken with my iphone 4 camera. Researched getting a #2 pentalobe tool, but saw ifixit had a 54 piece driver kit at a reasonable price. So, I bought it. Now I can open up just about any electronic device.
Extremely easy. Took out two screws, slid the back off and used a q-tip with a little alcohol on the camera and the cover lens.
Don't accept schmutz in your photos It's really easy to open up your phone and clean the camera with the correct tools.