Hi Fancy,
What you got, what I believe, is probably an "Ultrasonic Cleaner" solution, which is kind of purple in color.
That works the best!
You can purchase it for around $7/ gallon, and it will last for a very long time because you would only need about a teaspoon per cup of water to clean your ring.
Since Platinum rings contain less impurities, you can clean it everyday in this solution or use any other product- such as windex or ammonia- but use this very quickly to avoid any residue buildup and rinse right away.
Gold, on the other hand, contain many impurities that can speed up the oxidation process- hence, needing more polishing to remove them.
Best advice, put your diamond rings (no colored stones) in the dishwasher from time to time and you'll always have a sparkling ring.