Advice on Phalaenopsis Spikes

[SamDoehart]

I've had a pair of beautiful pink Phalaenopsis for about 9 months now. They were potted together when I got them and I have since repotted them into a larger pot that gives them more room. They've been doing very well and are each putting out their second new leaf of the year. All the flowers fell several months back, and since then I've been wondering what I should do about the spikes. This is the first time I've had an orchid and I can't seem to find an answer online. They haven't really browned, just gotten slightly darker at the tips, so I'm not sure if I should cut them or not. I'll include some images to show how they look. Any advice on whether to cut or not?