Probably dust particles and slight rotation while in the backpack.

  • u/lukmly013 💾 (lemmy.sdf.org)OPEnglish
    10·
    2 years ago

    Nope, but they may spin while in the backpack. Additionally they may also get pressed slightly. The scratches also develop on the cases themselves.

    • NeatNit@discuss.tchncs.de
      14·
      2 years ago

      I find it hard to believe that they’d spin so much while inside a case, no matter how it’s rattled. That said, stranger things have happened.