Touch ID on Macbook Air M1 not working
Macbook Air M1 2020, OS 11.2.3. Setting up a finger, usually right index, as the fingerprint, accepts ok and says can use, but 9 times out of ten it will work once the next time I need it, after that I get the shaking and need to put in the 4 character password for the Macbook. I have reset this more than a dozen times, trying different fingers, no success. I called AppleCare as I have warranty - just bought this MBA 3 weeks ago. Tech said to reinstall the OS! I told him no. I have done that previously on other Macs I have for other problems and it is a tedious process that I try to avoid, although I realize it may be necessary for some instances; I have lost data and third-party programs, even though I regularly maintain a Time Machine backup. I told the tech I did not think I should need to do a reinstall for this problem, since my print is recognized some of the time. Also, I'm aware of a possible problem with oil or a substance on the finger or the key.
If anyone has a suggestion, it will be appreciated.
Thanks.
MacBook Air (2020 or later)
