Mine seems to be exactly like yours, and what i do is, i wash it just with water (maybe a little soap, just a little).
But dont wash it hard, do it softly or probably some days later it will start to falling apart like someone told...
Then the best way to dry is just live it on a place where it gets sun and wind...
In fact, if you want to try it, just live it on a open area under the sun for like 2 days. Usually the bad smell goes completely away! but its good to wash it at least once a month