Originally posted by mee What are they going to do?
So I think the company is going to direct you to the warning label and/or just shrug. Waste of your time going to them.
On my can of compressed air by Fellowes, it neither states nor warns about potential damage caused by the extension tube nor denies liability caused by their product. (There are many warnings on the can, but nothing related to the extension tube.)
On the other hand, they do not state any warranties/guarantees either. And then you'd have to prove it was their product that caused the damage and that it was attached "properly". Either way, if you write the letter, include photos of their product and the K10D and the sensor, and evidence of repair or replacement costs. You may get better results posting something to their Facebook site.
A letter will result in one of the following:
a) Nothing.
b) A courtesy form letter denying responsibility.
c) A coupon or voucher for another free can of compressed air.
d) A response requesting you send in your camera to them.
e) A check.
I've done with Eveready and Duracell and have gotten both 'd' and 'e', but with compressed air, I'd expect 'b' or 'c'.
Those extension tubes are disasters waiting to happen, and I'd love to see companies other than WD-40 develop a better nozzle.
Bottom line: You know, you know....use a rocket blower.