First time repotting

[tgard87]

I bought a phal back in February from Trader Joe's and I have several questions on how to proceed with it.

1. I know that I need to repot it because it's in a glass pot with no drainage and all of the blooms dropped about a month ago. I'm afraid that this has already caused damage to the roots and need some advice on what size of pot to use. All of my phals in the past have been in clear plastic pots.

2. Once I find a pot, I need to know what kind of medium is recommended. Right now, the plant seems to be in bark, but I have no idea what kind.

3. I'm a serial over-waterer. I live in Phoenix where the air is extremely dry and I always feel that my medium dries out very quickly. That being said, when I increase the frequency of watering, I lose leaves.

4. Should I cut the spike? I've read quite a bit about this and some say yes, others no.

Any help with these questions would be greatly appreciated!