There is, but that wasn't the point.
If someone feels the need to use Windex with ammonium, have at it, it's not going to hurt anything. With the usual corrosive ammo that pops up being potassium based, there's no need, just use your tap. Some people, like myself, don't have any cleaners with ammonium in it. So I would be buying it for one purpose, which it wouldn't even help with.