14: IceScreen Mirror Mitz
Nothing is worse than going to start your car in the morning and it’s covered in ice. If you don’t have heated mirrors, then seeing out of your mirrors is also a pain. Nevertheless, the IceScreen Mirror Mitz were a unique thing that helped. You’d put the mirror mits on your mirrors prior to a frost, and they stop the mirror from icing up (via The Sun).
Not the most ingenious thing, but it seemed to do the job well. Unfortunately, most cars nowadays have defrosters built-in, so the need for these would be very slim. Nevertheless, it never ceases to amaze us how many unique items can be found in the automotive space when it comes to accessories.