24-105L dust issues.
I've had this lens for the past 3 months, and its lead a fairly sheltered life. Its done some work outside with it, but not much, and not in anything that I would consider super dusty conditions. In some recent work, I found that I've getting flare from dust that is behind the outermost layer of glass (F18-22 shots).
I'm not sure how it got there,but I am sure that the lens is almost unusable right now. I've never had this as an issue with any of my other lenses, including other L, non-L, or other brand lenses. I'm able to switch over to my 17-40L or Tamron 28-70, but it doesn't change that the 24-105L is the lens that I picked up to by my workhorse...
Is this something that I can clean out myself, or does it need to be sent in for cleaning? Has anyone else had a similar issue?
Thanks for any and all help.