This is simply a reinfestation with spirit meddlers. Because of his exquisite sensitivity to their energies and the many manipulations they can produce, it is hard for him to believe in a total freedom of such phenomena. Even though he does want this dearly on a conscious level, his inability to keep himself safe will, for a time at least, almost guarantee a reinfestation and when symptoms return quickly, he will lose confidence in the healing as well. The only way to succeed here is to get ahead of things by doing sessions repeatedly for him. This is being done already on automatic pilot, so to speak, but is not adequate to keep him clear because the level of human intent is somewhat less. So this is a true test of wills, in a sense, and can be augmented through your personal attention to do sessions for him at intervals. This can indeed be successful if you make that investment. It will still take some time but, in the end, you will win.