I have one Phal with two branched spikes and the flowers are nearing the end of their cycle. I've read some places that branched spikes will not rebloom, and other places say it's possible but not likely. Should I cut these spikes down? Just wait until they begin to wither? I would love to get more flowers out of it soon because they're so pretty but I don't want to tire out the plant. Any advice would be great!