i still have the stock radio in my 96 civic. plan on replacing soon, but it's not high on my priority list right now. the volume knob has a mind of its own. you might have to turn it right one time to turn it up and maybe left the next. then once you turn it up, it may not turn back down. somtimes it just turns down all the way and then beeps. is this a volume control problem that can be cured with a cleaning of the innards of the knob or is the radio just screwed? thanks