Bluetooth Headset

I have and though I think it may just be my device, it worked great until winter came. Ever since the first cold days, I've had nothing but problems with it. The button to talk/end sticks, as if it were sticky inside. If I knock it against my knee, it will pop back out. But it has never come in contact with any fluids or solids for that matter. The only thing I can think of is that it started when winter came. If I didn't pay so much for it, I'd throw it away LOL