I too noticed my M50's smell after sometime. But mine only smells around the leather material that touches my head around my ears. About 4 days of use without cleaning I would notice the odor. This after wiping it with cloth after every use to make sure its all dry. I use ethyl alcohol to clean...

I suggest you check out the Audio Technica ATH-M50. I bought mine a few hours ago. Been using it for 12 straight hours and I would still want to use them except my music source battery needs some juice. Look at the ATH-M50 reviews over the net. You wont get wrong with this product.In the...