1. Washed with soap, toothpaste, or baking soda.
2. Dipped in jewelry cleaner.
3. Soaked in ketchup, taco sauce, vinegar, lemon juice, or another acidic condiment.
4. Rinsed in bleach, motor oil, or grease.
5. Scrubbed with a pad, steel wool, or another type of abrasive cleaning implement.

.

Also know,

Similarly,

Simply so,

Related Question Answers