Want to buff out minor scratches and marks on your smartphone? Many online tech sites swear by toothpaste. Any light abrasive paste can work, including creamy toothpaste (not gel) or creams used to buff out car scratches. Just seal the ports and buttons with a little tape, and use a tiny bit of the cream on the scratched area, buffing with a soft cloth. Take your time, and be gentle with the cleaning. Over time, you may see a scratch-free screen thanks to this DIY solution.