Reference

Your tablet becomes slow or is not performing as expected.

    Your tablet may slow down when you use it in a hot or cold environment. Use the tablet in a place with a suitable temperature as much as possible [Details].
    If your tablet becomes slow or is not performing as expected, it may perform better if you turn it off once and then turn it back on.
    If your tablet’s data storage area is full, this may cause your tablet not to perform as expected.
  • Uninstall any unnecessary apps.