Did you use compressed air? If so it is quite possible it expelled some of the propellent on to your sensor.Compressed air and camera cleaning is a huge no-no.Jason
Visit my Nikonians gallery.
Copyright © Nikonians 2000, 2014
All Rights Reserved
Nikonians®, NikoScope® and NikoniansAcademy™ are trademarks owned by Nikonians.org.
Nikon®, Nikonos® and Nikkor® are registered trademarks of Nikon Corporation.