Anyone know an easy way to remove hard water spots on an interior? Our shop uses hard water and from time to time when spraying out door jambs, the cars interior gets wet leaving hard water spots here and there. You can cover them up with a silicone based dressing but I'd much rather remove them completely. I read where white vinegar can be used, but I don't know how much I like the sound of using that one black leather. Thanks in advance.