that is weird.
i'm at a loss with this one trixx.
it reminds me of ash from when you burn plastic but the characteristics you explain don't match that.
collect those samples and maybe one day you'll run into someone who can analyze it or knows someone who can. you wouldn't want to have to wait till easter to see them again.
you can attract someone who can help by keeping these ghosts in the front of your consciousness. the law of attraction will bring the right people to you.
think about the ghosts before you go to sleep too. this will target the info and connect you to the grid and the answer may come to you in a dream.
but yo, thats some weird shit right there lady.