Daniel, cut the spikes off altogether.
The idea is to remove anything that will take energy away from the plant's efforts to grow new roots. Partially cutting the spike and applying Keiki-Grow to the node is encouraging the formation of a new plant, which defeats that purpose.
One might argue that the keiki-Grow might result in you having a plant when the "mother plant" dies, but in my opinion, you're less likely to be successful with that, considering its current condition.
If I have misunderstood, and you have applied the Keiki-Grow to the nodes of the spikes you removed, then just throw them away. There is insufficient resources within a spike to grow a new plant to the point of being viable.
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