Can a rootless Den Keiki be saved? Help!

[NewBloom]

Please help. I don't know what to do.

While removing the keiki from its parent plant, I messed up the cut in a big way. The base of the keiki with the roots was left attached to the parent plant.

I soaked the rootless keiki in KLN solution and potted it in a bark/sphag mix. It's been indoors on a seedling mat. From time to time, I wrapped the pot in a plastic bag, leaving the plant exposed. I noticed condensation and worried about mold so I didn't use the plastic bag on a consistent basis. (The keiki is about 16" tall so fitting it entirely into something is a challenge.)

I've watered the media lightly once a week (plain water or KLN) as it dried out and I checked to see if there were any signs of root development. Nada.

That was several weeks ago. Now I'm noticing that the cane is getting wrinkly grooves. I took it out of the mix and put it in a vase of water with the base of the plant barely in water.

I have searched this site but haven't found anything on rootless keikis.

NB