Dryer sheets cause an itchy rash & bomb my system. We figured this out about a year or so ago. What a bother. So, we have someone staying with us & they use dryer sheets. I did not realize this and no one thought to pass on the request not to use dryer sheets. For a couple months, I have been wondering why I have been scratching so much; we’ll, it was resolved when I found a dryer sheet.
On a somewhat related note, I was talking with someone, today, who not only has problems with dryer sheets; but, he has problems with starch causing rashes. He does not have porphyria. Luckily, the dry cleaner does not use starch on my clothes.