Xero D-Trail sandals, is it just me?!?

Okay so I thought for a while my feet were just gross, because every time I wore the Xero sandals, the bottoms of my feet would flake, and I'd feel the dead skin when I walked and it grossed me all the way out. I have sensory issues, so I HATE feeling stuff on the bottom of my feet. I almost gave up on sandals altogether, but I ordered some leather sandals from Shapen, and I didn't have any problems at all with my skin flaking! I do microplane and moisturize my feet so it's not like they're caked in dead skin or anything. It seems to just be the Xero sandals that are the issue, but I'm curious if anyone else has had this problem! Maybe I just need to avoid rubber soles....