Its no more than 2 years old, bought it cheap but brand new. And its hardly been used as most of last year I had a company car.
Is it worth taking to have it cleaned? By the time I pay for that it may be just as expensive as getting a multiplay unit!
Not volume specific, just time. Takes about 1/2 to 3/4 hour to happen during which time the volume is normal about a quarter up to a third power.