1:14 I recommend using vinegar water during final rinse for cups/glasses. After you semi-rinse soapy residue, dunk it in clean vinegar water (in a large bowl) and give it a final rinse with running water. The vinegar helps prevent water residue. Or you can use diluted citric acid for the same effect but at a lower cost. Just make sure to use hot water when you dilute citric acid and let it cool down.