How to get rid of permanent marker from a mirror.
Even if you scrub the stain, permanent marker ink won't wash off.Other products can remove it.Unless a glass surface is scratched or etched, most of the ink will be on the top and should not be difficult to remove as long as you use the right chemicals.
Good air flow can be achieved by opening a window or door.The product you are about to use is dangerous.
Put on gloves to protect your hands.Let the spray sit on the glass for a few minutes.Mrscleanusa.com recommends covering the area with plastic wrap for a few minutes, but this may not be necessary to remove the marker stain from the glass.
To clean the stain, use cotton balls or paper towels.You'll have to spend more time removing the marker ink if you touch the paper towels or swabs directly on the stain.