I root them by sticking them in a pot of light textured soil and putting it in an east window. Water sparingly when dry. I haven't lost one yet.

I tried it in very slightly moist (almost dry) soil mix and it just didn't work lol. I can never get lipstick to root. I cut off to dead part of the piece I have left. The other one is gone. I really don't know what to do at this point. The piece that's left is limp but its seems if I add more water it will rot again. I give up.

Where are you located? If you're in the US, I can root a piece and send it to you for the cost of postage.