custom4584

I have an Avic d3 thats about 2 1/2 years old in my truck. The past few months i've noticed I have to turn the volume knob more and more to get it to go up or down. Its to the point now where I have to do about 8-10 full rotations just to get it to go from 5-20. Sometimes it even goes down 1 or 2 when you're trying to turn it up. What could be wrong and how do I go about fixing it. I'm assuming theres no warranty anymore. Its sooo annoying! Thanks.