Saving keikis from dead mother phal

[arc2404]

My phalaenopsis orchid has died at the base and all of the stems have dried up and gone brown. But I have two keikis on the stems and I'm not sure how to rescue them. They each have two roots - the longest is 2cm and the bigger keiki has four leaves and the smaller one has two, so they still aren't super big but do have roots. Should I remove the keikis from the mother plant? Or I've read you can cut the stems and sit them in water? How can I look after them and do they have much chance of growing bigger? Any advice much appreciated