How often should I replace the blades on my Magic Bullet Kitchen Express? 23 October 2026 12:45 Updated We recommend replacing blades every 6 months, depending on use. Related articles The cup/blade I ordered doesn't fit my machine. Help! Are the cups and/or work bowl microwave safe? Are they freezer-safe? What ingredients can I use with the blade discs? Are all components of the Magic Bullet Kitchen Express dishwasher safe? How often should I replace the blades on my NutriBullet? (all models)