Spot The Difference
When you bring your camera in for cleaning, there can be several levels of cleaning needed - you might be able to recognise which ones you need by looking into the viewfinder and at the images on your computer screen.
1. If you have black spots and hairs and insect legs showing up when you look through the viewfinder they are most likely to be on the focusing screen inside the head of he camera. If they do not show up on " live view " at the back screen you can be sure they are up in the head. Here's hoping they are not too far into the pentaprism or porroprism as this needs dismantling to get to.
Not to make too coarse a point of it, if you carry your gear in a filthy old camera bag that is leftover from the 70's, you can expect to do a lot of cleaning. Invest in a new one, and look for one that can be kept clean itself. The KATA range are lovely bright yellow inside and this shows up any dirt that falls in. They are spongeable so you can keep ahead of the game.