Wiping the cache can fix many unexpected bugs, restarts, and other issues. It is different from a factory reset in that no user data is lost - all data is preserved.
- Enter Recovery Mode using these steps - How to Enter Recovery Mode.
- Use the Volume keys to navigate to “Wipe cache partition”. Press the power button to select it.
- When it’s done (1-2 seconds), select “Reboot system” and press the power key to select it.