K&N's can be trickey to re-oil; how much is too much and how much is not enough?
I've a friend with a Honda CBR600 bike; he over oiled his K&N (Looked OK though) and the thing ran like an absolute dog - spoke to his mechanic who said just don't do it as it's impossible to get right + it helps the filtering if you believe the marketing BS. Obviuosly a bike is going to be more suseptable than a car but still worth bearing in mind.
I agree with Chris; buy a new one, or don't clean it. Or find a K&N service centre (Do these exist??) and make it someone elses problem, Always my favored approach!