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When it arrived, did you check it for latent damage (someone needs to do QC).
The approved procedure (best for iProducts but it will work here, too) is to hold the device vertically; gently lower it into a large pot of boiling saltwater. Now observe carefully: if it floats it was OK, otherwise, it was clearly defective.
I just knocked my Keyboard (an old Dell) on the floor...the 'stuff' that came out! Stuff I don't eating! also some worrying pieces of 3D printing supports? If I ever cut myself on near it I will get a shot for tetanus...