What to do with a Phal with roots, but no leaves?

[supersheep]

Hi!

I'm new to both this forum and growing orchids! I was given a Phal by my parents which had finished flowering so they didn't want it any more. They had already cut of the old flowering stem.

Anyway, it had healthy roots and leaves until a few weeks ago. Then, I noticed it had some bugs on which I identified (from pics on the net) as mealy bugs. I think I was too harsh in how I tried to get rid of them, because I accidentally knocked off a couple of leaves. I also think the insectide I used was too strong, because now the other leaves have recently dropped off and the main base of the plant is shrivelling up.

The roots still look healthy and green though.

I do think it's probably had it, but I'd like to try and rescue it, but I'm not sure what to do for the best now. I've browsed some threads on here, but am still not very sure.

I'd be so grateful if someone could let me know how best to try and rescue my phal with no leaves, but seemingly healthy roots.

Thanks!