Jane, Glenn's formula is something Glenn came up with - it's listed in one of his other cleaning threads somewhere on this forum. Don't recall exact proportions, but it's a combination of several easy to obtain ingredients, like linseed oil, mineral spirits, vinegar, denatured alcohol and dawn dishwasher soap (just a few drops of this). Not sure if that is exactly what it is - my recipe is out in the shed.
You won't find "Glenn's #1" in any store!