I really don't know what else to do with DS (10) smelly soccer boots. They stink, like unnaturally stink. He wore them for a match at the weekend after which I washed them with persil powder and dettol laundry cleanser. They were air-dried outside and DH sprayed scholl shoe spray inside them. They were fresh as a daisy. He wore them for training last night, came home soaked to the skin and stripped off in my bedroom to jump into my shower. He left the boots there overnight and now my bedroom smells like a creature has died in it 
Is there any way of stopping the smell?? It's so odd, his school shoes and other footwear doesn't stink at all. Maybe it's because he gets so sweaty when wearing them? Is there something he could spray on his feet beforehand they would help? Surely the shoe spray should have worked? Or do I just need to wash after every wear?