Phalaenopsis Multiflora-to cut it or not?

[Ivana]

Hello everybody!
Last August I got my beautiful purple Phal and I must say- it was the love at first sight! My plant came in a transparent, plastic pot so I was able to monitor almost everything that was going on inside the pot, as well as on the outside.
The plant was in a very good condition, lots of flowers on both of its spikes. Those that were not opened started opening very soon, and also, the plant formed few new smaller spikes coming from the main ones. The old flowers started dying after a few weeks, but the new ones were constantly forming, and it has been like that till recently. Now, I have only 6 flowers left (one yet to be opened). I have been watching it very closely last 6 weeks, because I noticed signs of possible new flowers on the spikes that are bare now, but they are not growing.
My question is- should I cut the plant all the way down to the base, or a bit above the third node, as I have read that those are the usual ways of dealing with plants that have finished blooming season? The explanation "wait until it gets brown" won't help me very much, because the spikes on my plant are brown- they have the same colour as trees have, they are not light green like I have seen on other plants. They just look... woody (hope you will understand, English is not my native) The leaves as well, they are not light green, like grass, but dark green and very firm, a bit redish on the bottom side.
Also, I am a bit worried about the potting mix- as I have found out from reading on this site, my plant has a bit of bark on the top of the pot, and moss in the middle. Should I also re-pot it? The plant never seemed it minds the moss, because it has developed a lot of new roots, and the new leaf is also growing very fast (I had to cut one leaf, as the plant fell down from the window and the leaf was damaged... I cried like a baby). I never used a fertilizer of any kind, as I am not familiar with it, and I don't want to cause some damage to my plant.
I hope I will manage to upload a photo. (I am not sure how that works, I have put it in attachments,hmm)
And some background info, the plant is placed on the east window, and I am living in Denmark, so, it has some direct sun (but not too strong) in the early morning, and a lot of indirect the whole day long. I water it when I notice the roots are getting silver- white, once in a 5-7 days, it depends. It is a tap water, but not directly from the tap, but a "few days old" as I call it, I believe it has less chlorine.