Okay, now that you’ve identified where the dust is on your DSLR sensor, it’s time to remove it. Before we get started, it’s important that you check your instruction manual to see how to prepare your camera for sensor cleaning. This will most likely be found amongst the menu settings. What this setting does is swing the mirror out of the way and open the shutter to allow access to the sensor. Be sure to have fresh batteries in your camera! You don’t want to lose power in the middle of things and have the shutter close when you’re working…that would be bad.
Before I get too far along, I want to emphasize that there are many different ways to clean a sensor and the examples given are solutions that work for ME. Understand that the goal here is to remove the dust with as little physical contact to the sensor as possible. I start with touch-less methods, then move to dry brushing and, as a last resort, to wet cleaning. Wet cleaning is something I don’t do unless I absolutely have to.
Okay, let’s begin with finding a place to work. I look for a dust-free area that’s fairly well lit. Since most homes are carpeted, I escape to the garage or a room without carpeting. Less fibers in the room, less fibers in the air. I also try not to have the room too dry. Dry air causes static and static attracts dust. My garage is fairly humid and definitely isn’t carpeted!
I clear off a space on my workbench, give it a quick wipe with a damp cloth (to further keep the dust at bay) and position the camera under a desk lamp. Shine the light through a sheet of white paper to create a larger, more diffused, light source to reflect across your sensor (I simply tape the sheet across the front of the lamp, being careful not to touch the bulb for safety’s sake.
Next, I hold the camera (with lens still attached), turn away from the work area and give it a blast or two from my blower to remove any surface dust that might find its way onto the sensor once the lens is removed. Turn back to your work area, remove the lens and activate the “clean sensor” option.
Angle the sensor so that the light reflects across the sensor, causing a nice, white reflection of the lamp onto the sensor. If you’ve done everything right, the dust should show up clearly against the light coming from the lamp. I use an Optivisor magnifier to better see what I’m doing, but a loupe or other hand-held magnifier will work fine also.
With the camera held firmly, blow across the sensor with your hand-held blower to blast the particles up and off the sensor. Be careful not to touch the sensor with the tip of your blower. There are many blowers on the market but I like the Giottos Air Rocket best. Keep in mind that you are using the blower to blow on the sensor, not the entire area surrounding it. Your goal is to blow the bits off the sensor, not stir up all the bits and pieces that may be surrounding it. I use a series of targeted puffs to get the job done. You’re removing dust, not sandblasting.

The Giottos Air Rocket
Check the sensor again with your magnifier to see if the dust is still there. If so, repeat until you don’t see any dust. The chances are good that you were successful. At the very least, you’ve eliminated most of the sensor dust.
While I don’t carry my blower with me on assignment, I do carry it in a second bag with my laptop and other items used when away from my office. For quick cleaning, the blower is definitely the best way to go.
Put the lens back on your camera and repeat my test from part one. If you still have dust, we escalate the process and move on to cleaning with an anti-static brush. That’s what I’ll cover next.