Accu Chek Reset [updated] -

An error code (such as E-1, E-3, or E-9) persists after troubleshooting.

Always check that your time and date are correct after a reset. Incorrect timestamps can lead to confusion when reviewing your glucose trends or sharing data with your doctor. If your meter continues to malfunction after a reset, it may be reaching the end of its lifespan—typically five years—and may need to be replaced.

If you want to wipe the device clean and return it to factory settings, the method depends on your model.

: Carefully flip the wet pulp layer onto a damp cloth (this is called "couching").