Certainly not an urban myth re. a "certain fizzy drink" and cleaning a windscreen--like the good Dr I above--have done it myself many times in the past. Bit off topic, but the syrup version, ie before it gets "processed"--was regarded as being one of, if not the, most difficult substance(s) a very well known can and container producer in the UK ever encountered--which is why I only ever used the stuff on windscreens--never my delicate anatomy