Press and hold power key to completely switch off the device. Then connect the phone to a pc and laptop, press and hold Volume up and power key simultaneously. After sometime a boot screen will appear. Use Volume up and down button to select Delete Cache Partition, once selected, press power button to delete cache Partition. Ignore warning message. Then reboot. Enjoy a smoother system. Theoretically, after Android 11, update partition is separate and no need to delete the Cache Partition, but in relaity, it helps a ton. Cheers.
