I’m sure
@Shadrach uses the same basic methods I did. Soaking, Gentle debriding with a soft toothbrush, and regular slathering with oil/vaseline. My only suggestion would be to cut the vaseline/petroleum jelly with some mineral oil to make it more meltable, for better penetration and coating under the scales. Then I resorted to ivermectin, which works
very well at knocking everything out. I don’t believe it is permitted in his area though, and I was treating
extreme cases of neglect... if there is something else amiss in addition to the SLM that can be really draining on the bird.