You will have to kill em with a gentle waft of fly spray. Don't spray it into the camera, lots of things in there don't like moisture. Don't use a persistant type either.
Use a small electronics type vacuum or a soft bush to get the bodies out.
They will be every nook and cranny, even stuff that looks too small for them.
If you are lucky they won't have built any little structures in there. If they have, they stuff they use is sticky and really hard. You may need to get it professionaly cleaned.
I know this cause the little buggers moved into my satelite decoder and vcr while I was away on a course. Saved the decoder, but they got inside the motor casing for the video and gummed it up.:frown:
Oh well, time to buy a new stereo one. Insurance company had a laugh
Good luck