I guess you are talking about this topic.
The massaging is not the thing that may help with this issue, it is just a technique some people used if they had trouble taking off the screen.
What may help is cleaning the connectors between the screen and the main module.
For that you need to take off the screen and if that is difficult there is a super easy trick here: disassemble.
But I agree, a software issue is more likely. To test if it’s caused by an app you could try dic:safemode.