Ammonia does nothing to remove corrosive salt fouling. It works on copper fouling. All thats needed to remove corrosive primer fouling is hot water run through the barrel and bolt face areas. Windex is ,what, 99% water? Seems like expensive water to me.The ammonia in Windex will neutalize the corrosive salts. Remember to spray down the bore, bolt and action as the chemical that promotes rust will go any where fouling goes.