When I do sit-ups on my new mat I pick up a static charge.

The first time I touched my 2015 MBP after picking up the charge, either the palm rest or a key, I got a nasty shock, but I no longer get a shock from my 2019 MBP.

If not the specifics, can somebody make a general guess about what may have changed?

Or, on the other hand, was my 2015 MBP defective?

Thanks.


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