Hmm, I'm no expert but the problem would be the tangles right? Have you tried a really bad*** detangler at all? You may want to get something nice and cone-y and hope that makes some of those tangles come undone. If you're living in a dry area now there's no doubt you'll need moisture treatments and to make only controlled use of humetants.
I hope someone else comes along to help as I've never really suffered bad tangles. I'm just pitching some ideas.