I suggest that you take your camera to a nearby service center for a clean-up. Check and see how much it cost for the clean-up. Normally, it doesn't break your wallet. I don't suggest that you purchase any seperator dust spray; you may damage your camera unintentionally. Eventually, I carry my 2 EOS DSLR for cleaning up once in a few months or so. Good luck .
I have dust mites in the body of my camera and in my lenses.
How do i get the out?