Emergency citrus saving mode, PLEASE help!
So, I recently posted about my citrus getting possibly burned by the sun and dropping all of its leaves. Now, it's in a sunny windowsill in a warm kitchen with a small humidifier next to it. Figured it would get better. Here is the thread about it so I don't have to retype it ALL.
Now my poor tree, with ONE good leaf left, is browning at the branch tips! I don't know what to do. I NEED to save it. I was thinking maybe root rot that was started at home, and the moving it back to school just traumatized it enough to exacerbate the issue. So even though it's doing really poorly, tomorrow I'm off to get new dirt. I'll soak the roots in 20% bleach solution for 20 minutes. Does that sound good? Here are current pictures of the tree and roots. I clipped off all the brown ends.
The roots are brown. They aren't slimy and the coating doesn't come off in my hands if I rub it. But I guess I'm not sure what else it could be. I haven't watered it in a long time - several weeks - because the soil has been damp, I haven't needed to, which is what makes me think the beginnings of root rot. I can't take it out of the pot - it doesn't just slide out, so I dug up some to take a picture.
What do you think?