When setting up your workstation before tattooing, you should place a small cup of water on the side. When you’re changing ink colours, just dip your needles into the cup and let your machine run for a few seconds.
Take the tattoo needles out of the cup and stop your machine so that you can wipe off any excess moisture with a piece of paper towel. It’s important to have dry needles before dipping into your next ink colour, or you could potentially dilute or tint the ink. Be careful not to get any lint from the paper towel in your tip or on your needles!