Ok I will give it a try all the C99 clones didn't make it. Maui look ok one is turning a bit yellow maybe its trying to root.Mine does the same thing if the soil is too wet, when I put the cutting in it.
I have had way more success since I read somewhere that the soil needs to be the texture of moist cake, when you stick your cutting in it.
I killed two in a row, that exact same way, right before I started doing the moist cake thing.