Opening up your expensive dSLR camera to clean it may seem intimidating, but it doesn't have to be scary as long as you prepare properly and use the right tools. You open your camera to the elements every time you change the lens, and dust or grit can sidle in there to sabotage your images. That doesn't mean you should keep your camera sealed up in an antiseptic box.
Cleaning is easy enough that you can happily take your dSLR with you into all sorts of environments safe in the knowledge that you can deal with any imperfections creeping in.
That said, the sensor is the most sensitive part of your camera (obviously) so only monkey with it if you're completely happy with what you've read here. Remember, if something goes wrong you could have a hefty bill, so take it one step at a time.
The basic tools you'll need for cleaning your SLR's sensor are a rocket blower, sensor cleaning swabs and sensor cleaning solution. These are available from specialist camera shops, as well as online. We bought our kit in handy packs from cameraclean.co.uk.
For cleaning your lens you'll require lens cleaning solution and lint-free cloths. It's important to use cloths that don't shed tiny lint fibres -- this will defeat the purpose of cleaning. These are available from high-street stores, as well as specialist retailers and online. We bought a pre- packaged lens-cleaning kit from Jessops.