Reading the other reviews I thought this would be a good product. I should of done more research, if I had I'd have realised it's very overpriced - even if it worked properly which it didn't.
The problem is that at intermittent occasions it shoots out some kind of supercooled liquid. This creates a white residue & causes damage. If you aim the can at your skin and the liquid comes out it feels like your skin is burning. I'm guessing it's the gas in liquid form (as it is inside the can) because it evaporates almost instantly.
Don't use this "compressed air cleaner" on electrical equipment, not if you don't want it to get damaged.
Take note: some of the above reviews aren't even for this product - specifically the most rated one at the top.