Chosen Solution
Just replaced the screen (home button would never heat up prior to screen replacement) the bracket thingy that has four screws is screwed in (bar the last screw on the far right i lost that one) could that single screw missing be why the home button is getting so hot?
The screw missing for the right hand side of the home button bracket isn’t why the home button is getting hot. The home button is damaged in some kind of way most likely when it was transferred from the old cracked screen to the replacement screen (basically a short circuit from the home button causing it to become very hot). Try putting the home button on the old screen and see if the issue persists on there if the screen still functions.
