This is quite common to be back at home after a shooting, pull out the memory card, play with some new photographs. And of course, we easily forget to take care about our equipment.
But having your camera, lenses and etc. clean is really important. Clean lenses provide a good survey. It is the same like having a clean window which can make any view look much better. If your windows seems to be dirty and covered with dust, you can ask for professional help via www.cleanfantastic.com.au/windowcleaning.php
and it is the guarantee that in next 24 hours you will have the crystal clean windows, but if it goes to your camera you can care about it by yourself.
The most fragile parts of any digital camera is the sensor. If you damage your sensor during cleaning you will have to buy the new one and it is going to be quite expansive. And there're two ways out. The first one is waiting until the sensor is too full of dust to get along with this and bring your camera to the professional cleaning service. And the second one is to do it at home, but really accurate. Set the camera to the manual mode with a 20 sec exposure.
While cleaning the sensor and suddenly close the shutter, you are in danger to damage the mirror, sensor and shutter itself. Despite the fact that you use the "B" mode for a remote release, the batteries on the remote could give out and shut the shutter down.
But with a completely charged batteries and a 20 sec delay, you have the guarantee to do everything right. When the shutter is open, hold the camera off so the sensor is leveling and use the blower to clean any dust from the sensor. Remember: You must never forget that you need to be really careful to do it, if you are not quite sure that you are able make it right, it is better to seek for professional help.