WD-40 cleans all that gooey adhesive that they stick labels on with.
To save sandblasting the widow in a sand blast cabinet stretch some black widow screening over the inside of the window, attach with duct tape.
Duct tape will also protect glass from sand blasting, like on a window frame or such.
That same tape does a fair job for when paint stripping also, but aluminum foil tape is the best.
Aviation uses foil tape on plexiglass when they paint strip aircraft.
Another recent discovery.
Fine auto body rubbing compound does a super job of cleaning up baked on gunk on stove tops and oven doors.