1) Turn off the device.
2) Then press and hold the home key + power + volume up
3) Release the power button once you see the logo, but keep the home and the volume keys up.
4) Now when you see the Android logo, release both buttons.
5) Use the volume down to navigate between the options and select Wipe cache partition.
6) Now use the power key to select the option.
7) Here you select Yes when you are prompted to the next menu.
Now wait until the process is complete, once done restart the device in order to finalize the procedure.