I get a lot of emails asking about how to scent Smart Sheep wool dryer balls with essential oils and what kind of oils to use. I recommend several brands including NOW foods (found on amazon), Doterra and Young Living. The scents I recommend trying out first are lavender, lemon, tea tree, and orange.
The easiest way to scent your dryer balls is to simply dab a few drops on 2-3 of the balls. Let them dry for about an hour (or quick dry them alone in your dryer) and then toss them in with your laundry. However, some people don't like this method because depending on the type of oil used, it may stain your balls. (However, the dryer balls are still totally fine to use, they just may look funny.) If you want to avoid oil stains on the balls, try injecting the oil inside by using a meat injector or syringe.
How often should you re-scent? This depends a lot on the strength of oil used, and your personal preference, but generally I re-scent every 4-5 loads. Hope your laundry will now be filled with wonderful, all-natural smells!