Home Button

So, I woke up this morning and I go to shower. I may have pressed my home button with wet hands, but it was just water and I had done this some times before. I go to open my phone about 30 minutes later and my phone button was WACK. Sometimes I pressed it and nothing happened but other times I press it vibrates as if I pressed it 5 times and accesses siri or the history. I have no clue what happened or what to do. What I am doing now is using assistive touch. I would like to fix this, but I don't know what to do. Help.