m0useanswered grow question 2 years ago there's a lot that can cause a clone to die.
Environmentals are huge when dealing with clones, EC, PH, Temp, Lighting, RH, watering, mediums, and other contaminates that work their way into the mix be it virus/bacteria or chemical.
Best thing you can do it try and try again till you find what works best for you.
I tried cloning some of my plants before and I just put them in a glass of water till I saw some roots, changed water every few days and it took a while but once I transplanted them I only lost 2 out of the 10-15 I was testing. I gave them lots of beneficial microbes as well when planting them from the water jar to the nursery pots. When I transplanted them all outdoors in different spots they all disappeared in a week. No biggie, it was just a test to see if I can even clone stuff out. So that's my experience with it all.
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Best Of Luck!