Strikes me as strange that they're coming off non-carrier plants as they live on leaves, not so much soil... but I'm not going to call you a liar... some other plants in the house... ivy?As far as where I got the clones from, I got them from my plants.
I hope you read those links offered up... loads of perspectives contained there in...
Best of luck on finding a resolution.
I know that your attention to detail will be one of the primary factors... so keep your eyes open!!! Do not slack off!!!