Software needed:
Steps:
- Install CC cleaner from the above link and use the to scan your Android box

2. Install Unapp from the link above and launch it. This will allow you to select multiple apps that you have installed and then give you the option to remove all of them

3. Use Developer options to adjust animation scale. Go to your settings, About and where it says Build, click there 7 times

Go back to settings and you can now enter the Developer options. Inside there turn of the animation scale on these 3 options

Further down, you can adjust how many background processes can run at the same time. I recommend setting this to 4

Set this to 4

Keeping your Device cool
Last tip is to buy a usb cooling fan, this will keep your device cool and prevent any CPU throttling

Watch the steps here: