I realize that this thread has been pretty much dead for roughly a month or so now, but it felt weird to make a new topic just for this one little detail about TFA.
“Kylo Ren’s table of Ashes in TFA explained”
http://www.starwarsnewsnet.com/2016/04/kylo-rens-table-of-ashes-in-starwars-theforceawakens-explained.html