If you notice that the printed pictures start to "fade", or have vertical or horizontal white stripes, the camera needs cleaning. Here are the instructions:
  • You don't have to disassemble any parts from the camera. Simply open the printing compartment and you will have access to the roller and the printer head. 
  • Use a soft cloth (glass cleaning cloths are perfect), you could dampen it slightly and then apply a bit of pressure to clean the printer head thoroughly. Push the printer head up against the spring and try to clean as much area as you could reach on the bottom of the printer head.
  • Turn the roller to clean it all around. 
  • Let the camera dry for 2 hours. You may also use a hair dryer (in low heat low speed mode) to speed up the process.
Turn it ON, print a picture, and it should be back to normal.