Soak it in lighter fluid for 5 mins. Then remove, then wash with dishwashing liquid. Then freak out over all of the smudges!! Then more lighter fluid, rub well with a paper towel, then more dishwashing liquid…repeat as necessary, till you get a crystal clear surface. Trust me, you’ll get there.
Soak the paper towel with water when done; spontaneous combustion is a real thing!!