[Najabat Kamal]

Hi. I have been facing a strange problem. I decided to sell my phone but few days ago, I have noticed a strange thing in my phone that when I close apps, no matter I press home button or clear cache or close properly, I still can see the last used or multiple apps on home screen or sometimes on other apps with low opacity. Soft, hard reset didn't worked. Even flashing my phone didn't worked for me. Need help asap. Thank you.

I have LG V10 VS990 (Verizon US)
Marshmallow

[Rukbat]

First, turn down the brightness - you're probably running at 100% brightness. Indoors, 20% might be enough.

Then, since it sounds like screen burn-in, take a screen shot and see if the other apps still appear. If the don't appear in the screen shot, it's burn in. Take a look at this page - one of those apps should fix it.