Ever had your phone acknowledge headphones plugged in when they're not?

I, like many others, have had my fair share of problems with my LG Revo.  The problem I am having now is that my phone is claiming I have a set of headphones plugged in to it.  I do not.  I hadn't had a set plugged in all day before I noticed I had a problem.  I usually listen to Pandora on my device.  When I am at home, I use the speaker on my phone without using headphones.  When I am in my car or while at work, I use the aux out.  I did have a water balloon popped on me today while my phone was in my pocket.  I don't believe this is the source of my problems.  I have powered down multiple times and even took the battery out.  All to no avail.  Any other suggestions?