best way to get rid of stickers on glass?

the thing you read is probably about razor blades scratching glass, which they don't if you keep the blade flat and the glass wet. soak the sticker with warm soapy water or a little cooking oil, wait ten minutes, scrape at a low angle with a fresh blade, then white spirit or glass cleaner for the haze. where it is a bad idea: tempered glass (shower screens, oven doors) and coated windows - the coating scratches. hair dryer and peel for those, then the oil.