Our wool is cleaned using soap and water.
In the washing and carding process at the mill some of the remaining hay comes out of the wool, and some is just broken up into really fine little pieces and continues to be present in the wool. You may not see it, but you may be itching because of the microscopic bits of hay that remain. I can remember being itchy all day as a kid when I wore a wool sweater--even through the turtleneck underneath! So I am sympathetic when folks tell me they're allergic to wool. I get it. But please don't dismiss a wonderful resource just because of a bad experience.