A seasoned commercial pilot has revealed how the windows on planes are cleaned - and a surprising product is used in the process. Some pilots use fizzy drinks such as sparkling water to clean the plane windshield. She points to another clip of a pilot cleaning a plane windshield with what appears to be Sprite - but says it is likely soda water. 'Personally, I've never used soda water,' he says, 'but if it works, is not abrasive and does not cause damage over time, why not use it?' Fizzy drinks, like club soda or sparkling water, also don't leave behind streaks or a sticky, sugary residue.