Why won't my iPhone charge unless I'm squeezing it?

It sounds like your charging dock connection is loose, and you have to squeeze the connection in for it to work.

Here is a image of the connector, courtesy of ifixit: http://goo.gl/Qgzjt

Here is the guide to stripping down the iPhone to get to the docking connector, again, courtesy of ifixit: http://goo.gl/c8LUy

Also, it might be your mainboard itself is damaged, or it could remotely be a bad battery.

Best of Luck,

Tough Gaming Technical Support

Agent Elisha