My suggestion would be to keep the plantlet attached to the leaf, dust the ends with rooting powder, then place it gently in a mix of 1/2 perlite or vermiculite and half african violet mix. That way it can get started putting down it's own roots and still have nourishment from the leaf.

Maybe others with more experience will give you other options.

Do you have any pictures?

In my experience you need to remove all dead tissue - otherwise the rot will kill the baby.

After you trimmed the leaf to the healthy tissue - you can put it in a humid sphagnum moss - orchid growers use it a lot- leaf on the moss - and just a bit of moss around the baby. Sphagnum moss has antifungal/antibacterial properties. And then you put the whole contraption in the covered transparent container - like the salad tray - and put it somewhere in indirect light - and keep an eye on it so it will not dry - spray it with water every so often.

This practically guaranteed way to get baby send the roots.

What BansheeBanshee suggested will work too - the chance of success will be someway lower, but even without rooting powder - but provided it is in airtight container with high humidity - and the rotten tissue is removed - I think it will work.

Irina

when i grewthem in high school lots of them did this plant the mama leaf as close to the leaf as possiblethat way the leaf can root and nourish the baby