"If I had a nickle for every time I heard both of those comments..." Zecora chuckled, a low and rich noise as she gently applied the gel bandage. "Yes, I do think it is necessary. Fae magic is the essence of chaos. If it does not have a purpose, even small lingering amounts can cause a great deal of trouble. If it helps, think of iron as an antibiotic itself, except against magic rather than bacteria."