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What should I do if the grinding head is worn out or lost of nail file NC02?

These grinding heads are replaceable accessories. 

If it worn out after normal use or lost in the warranty period, you can contact the manual support for replacement.

Or you can go to the Momcozy official webite and purchase the parts.

If you find that an accessory was missing right after receiving the product, please contact us and send us the unboxing photos and your order information, and we will first verify the details and follow up with further assistance.