Iphone home button activates siri with single press?

My sound on my iPhone 4s has been broken so this morning I cleaned out the charging dock with rubbing alcohol. Now the home button doesn't work -- when I press it, sometimes nothing happens and sometimes it activates siri even though I only hold it down for the short press. Does anybody know what's going on/how to fix it? I fear it has something to do with the rubbing alcohol. I don't care that much about the sound problem, I just want the home button to work!

You have water damaged the circuit in that area.inmidiately tuern off the phone and put it in a bag of rice for 24 hours, you should not have put any type of liquid near your phone.

Hope it works after!