Hi, I tried searching through GBAtemp & Google *very* briefly to try & find a clear answer to this before I littered the forum with more questions, but could not seem to find anything. What is it that would cause a Switch NAND to become "dirty"? I haven't done a whole lot with my Switch yet, so it probably still has a "clean" NAND, but how would I be able to be sure of this? Thank you!