Just watched D Miller, How to Wash Dishes. He mentions wool dishwashing aid. What is this product exactly?

Hi Len! There are some wool or nylon "scrubby" products you can buy instead of steel wool. They're much easier to clean than steel wool because they don't rust over. Here are a few that might be in line with what Peter recommends:

https://food52.com/shop/products/1595-reusable-pot-scrubbers-set-of-5
https://www.etsy.com/listing/197962765/kitchen-scrubby-non-abrasive-felted-wool
https://www.etsy.com/listing/659011722/wool-scrubbing-pads-set-of-two-felted