While smart sheep wool dryer balls are a great all-natural alternative to dryer sheets, there can sometimes still be static, esp in winter. And its winter now. Please keep in mind these tips:
1. Try pinning a small safety pin on one ball to diffuse static.
2. Try taking your laundry out 5 min sooner so it does not overdry.
3. Try using a vinegar rinse in your wash.
4. Try throwing balls of crumpled aluminum foil in with your dryer load.
Hope these tips will help you have a static-free winter!