With other cleaning materials.
Super strength liquid cleaning agent for glass, porcelain and plastics. For most cleaning problems, including non-greasy residues, add 20 mL of this concentrate to one liter of water. To remove grease, add one part of methyl or ethyl alcohol to two parts of the above cleaning solution. While the product is expensive, a little goes a long way and is a safer option than using dichromate/sulfuric acid.