How to scratch a tattoo: a few options. Method one involves using a frozen cube of water or a cotton ball that has been doused in cream or vaseline.  Hold the ice cube or cotton ball against the tattooed skin for a few minutes after applying the cream or vaseline. Utilizing alcohol wipes is just another option. To clean a tattoo, wet a wipe and apply it to the ink. Use a dry wipe to remove any remaining moisture.