After repairing for many years I was thinking I have seen all kind of crazy things. But sometimes camera owners are more inventive, than my phantasy.
I have got a 60d for repair. No sign of life. Before stopping, the camera has been used in a wet surrounding, so I recommmended to be disassembled immediately.
And I have got this:
Yes, the outside was full of mud. The inside…. the same. A fine powder everywhere, as the camera has been used in caves for the last 2 years.
After cleaning it, partially in the sink under the water, others in an ultrasonic bath, others just with a brush and alcohol, I used for this 80 literes of 10 bar compressed air (this is all my spare volume of air), I assembled it – and the camera started. Wow.
And I always tell to people, that 60d is the most sensitive Canon DSLR, for which can happen, that you put it on the table in the evening, and will not switch on in the mornig, only after exchanging the DC-DC unit.
This is a Camera Rambo.
By the way, if you want to us your camera in wet or dusty atmosphere, pls be aware, that these cameras ARE NOT protected agains water or dust intrusion. Keep them in two hermetically closed plastic bag, case you have, put some silicagel in the bag, and after using the camera put it back in the safe place.