Professionals' equipment might look beat up but i can assure you it's spotless!
Before turning pro I spent several years as an assistant. After opening the post and getting the coffee on my first job of the day was to strip down all the equipment and give it a clean. And my last job of the day was to strip down the equipment and give it a good clean.
One speck of dust in the wrong place can screw up a whole bunch of pictures and this is just what you don't need when you are doing it for a living.
This is what I know to work:
Wash and dry your hands before you start.
Use a soft brush - preferably a photo brush. Try not to touch the bristles themselves as this can transfer grease to the equipment.
Brush all around the part you are cleaning to loosen any dirt and then use a can of compressed air to blow it clean.
Clean lenses front and back and around the mount.
Clean cameras inside and out.
Do all this on a clean table and keep the cleaned and 'dirty' kit seperate.
If you do find fingerprints on lens elements or inside the camera, clean them off using a proper lens tissue and breath on the item to mist it slightly. Clean with a gentle circular motion. Repeat until the mark has gone. Use a lens tissue only once.
NEVER use those bits of furry cloth you get with spectacles.
Store lenses with lens and end caps on. Store the camera with the body cap on.
Never store equipment in camera cases that have foam rubber inside. This stuff breaks down over time to make a sticky dust.
Use camera bags with fabric inserts and vacuum them once a week.
Carry a can off compressed air with you and use this to clean your kit during use if you see a need.
All the above may sound a bit anal but it guarantees minimum dust worries. And I was working for photographers who were getting paid £20,000 for one shot! With that kind of cash at stake you don't take chances (and if anything got screwed up it was the assistant who carried the can - namely me).
If you use these cleaning tips and clean your kit before a shoot and after you shouldn't have a problem.
And if you want to know what problems one speck of dust can cause just ask and I'll give you the list
