How often should I replace the blades? 05 January 2023 23:18 We recommend replacing blades every 6 months, depending on use. Related articles The cup/blade I ordered doesn't fit my machine. Help! What ingredients can I use with the blade discs? How do I replace the rubber gasket/seal on my blade? How do I identify which machine I have? Are the cups and/or work bowl microwave safe? Are they freezer-safe?