Hi, just make sure the ears are kept dry,the scabs need to be allowed to dry up, if the ears get wet then dry them off with the hairdryer,maybe put a snood on when he goes in the garden if it's wet and if he'll keep it on.(There are savaged snoods all over my house!)Eventually they will detatch and come out when you comb, just be really gentle as you can easily split the skin.
Hope I've helped!