Mitsubishi Lancer Owners Manual
The window glass can normally be cleaned using only a sponge and water.
Glass cleaner can be used to remove oil, grease, dead insects, etc. After washing the glass, wipe dry with a clean, dry, soft cloth. Never use the same cloth to wipe the window glass as would be used to wipe the paintwork; wax from the painted surfaces could adhere to the glass and reduce its transparency and visibility.
► To clean the inside of the rear window, always use a soft cloth and wipe the window glass along the demister heater element so as not to cause damage.