Here’s a fun experiment. Wash one pillowcase in bio. Wash another in non-bio. Sleep on them blindfolded. Can you tell the difference? Probably not.
Is Non-Bio Laundry Detergent Better for Sensitive Skin? – Arborfill
Unless you get a reaction. If you do, it’s likely the fragrance or a preservative, not the enzyme. Swap to a fragrance-free version of either type. If the itch stops, you’ve cracked the code.
Sensitive skin is a mystery. Detergent is not. You are the detective.