I give him zesty paws immune system treats.I’ll try out Jacks recommended dosage of ivermectin for 2 months and see what happens .I will also try out your spray .Im not sure if bathing him in oil will be effective,as the mites are deep in his hair follicles and oil glands.He gets a yellow,flakey crust on his ears and forehead that won’t go away,I’ve tried goodwinol,antibiotics(topical and orally) ,nu stock,A& d ointment none of it has worked thus far. He is 8 months old btw.They say it’s juvenile onset and that once cleared it’s unlikely to come back ,as his immune system naturally gets stronger as he matures .All dogs have the mites that cause demodex ,it’s only when the dogs immune system is weak/immature that the mites over populate and wreak havoc on the hair follicles .