UPDATE: My orchids are doing so much better!
I noticed the roots getting brown and kinda soggy/mushy. So stopped watering them for about 2 weeks. I let the CHC get completely dry. Then I watered them and added some rooting hormone. And when I watered them, I used about a quarter of what I used previously.
I just checked them, and all 4 show signs of new growth! All have white roots with green tips, at least ONE on each. On the biggest one, there are new leaves starting to show.
Thanks for all your help!!!
I will post some pictures when the weather turns nice enough for them to go outside. Later.