Is the “dust” on H Mart roasted sweet potatoes dirt or just char?

​I love the grab-and-go roasted sweet potatoes at H Mart, but I’ve heard conflicting things. When I wipe the skin, a dark, dusty residue comes off. I can’t tell if it’s leftover dirt or just charred skin from the roaster.

​For anyone who has worked there:

​Are they washed/scrubbed before roasting?

​Is that “dust” safe to eat, or should I keep peeling them?

​Trying to find the source of truth on this. Thanks!

submitted by /u/metabrewing
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