In which scenario is it best to change the electric file's bit?

Changing the electric file's bit when it shows wear is important for several reasons. A worn bit can affect the quality of your work, as it may not cut as efficiently or smoothly as a brand-new bit. This can lead to a less polished finish on the nails, requiring additional work to achieve the desired results. Additionally, using a worn bit increases the risk of causing damage to the natural nail or surrounding skin due to inadequate performance.

Regularly monitoring the condition of the bits ensures that you are providing the best possible care for your clients' nails. It also promotes safety and hygiene in your practice, as worn bits can harbor bacteria and lead to infections if not properly managed. Therefore, changing the bit upon noticing wear is the best practice, ensuring that you maintain both a high standard of service and the health of your clients' nails.