Stain varnish on glass can create an unsightly stain that is very noticeable against the clear glass. Stain varnish may get on your glass if you have used a stain to colour a wooden coffee table with a glass top or a mirror with a wooden frame. Dried varnish can be very difficult to get rid of with traditional soap or glass cleaners, but a simple item such as rubbing alcohol can take it off in a snap.
Dust down the glass with a dust rag to remove dust or debris, which can stick to the varnish and make a bigger mess to remove.
Pour rubbing alcohol into an empty spray bottle for easier application.
Spray a few squirts of the rubbing alcohol over the varnish stain and let sit for about 30 seconds.
Rub a cotton swap over the stain to work the rubbing alcohol into the varnish until you see it begin to break apart.
Wipe the remainder of the stain away with a clean rag.
Finish by using a window cleaner on the glass to remove any streaks caused by the rubbing alcohol.