i've only ever used a dry microfiber cloth on the dash, and I wouldn't consider my pressure light either. But never seen any marks as a result of the towel. It almost seems like the OP's dash is coated with something and that coating got disturbed.
I have an early build (VIN 0068xx) and a lot of us had the issue of some sticker imprint left on our dash. alcohol wipes apparently solved that one.
I have an early build (VIN 0068xx) and a lot of us had the issue of some sticker imprint left on our dash. alcohol wipes apparently solved that one.