Why is my r2 trigger always pressed even when I don't press it?

My r2 button is pressed automatically even when I'm not pressing it.

Yesterday I was playing fifa and my player was sprinting on its own (r2 is for sprint) without even pressing r2 I don't know why.

I recently changed my conductive film and this issue occured. I even cleaned the buttons still no luck.

Please give me a solution.