Cleaning the Sensor

While I wouldn't touch the focusing screen again, cleaning the sensor is still something I'd do on a periodic basis.  If you use your DSLR on a regular basis, there is no escaping from getting dust on the sensor.  (To be more specific, it's not the sensor you'd be cleaning.  It's the sensor filter in front of the actual sensor and shutter.)  I think it's something everyone that shoots on a regular basis need to learn to

do.  Sure, you can send the camera to a shop to have it cleaned but it's really an easy and quick job.  There are many good YouTube videos that show you how to do this but the tools you'd need are as follows:

1. For dry cleaning:
1. Use an air blower first.  You can get one from Amazon:  https://amzn.to/3xU0TAI 
2. If there is still dust, use a statically charged brush.  I bought a Visible Dust brush:  https://amzn.to/3IWGm4R 
3. I haven't tried a cheaper alternative to the Visible Dust brush but this could work equally well:  https://amzn.to/3SxdpiV
2. Wet cleaning:
1. If the dry cleaning methods don't work, the dust bunnies are bonded to the sensor filter.  You'd have to rely on a wet cleaning method.  This kit on Amazon works well:  https://amzn.to/41ozrse

For wet cleaning, you don't need to fear much about touching the sensor filter.  The swabs are very soft and are lint free.  Being lint free is so important--don't even think of using a cotton swab to clean your sensor!

Dust bunnies will sometimes ruin your pictures so it's important that to do regular maintenance of the sensor.