Never heard of Dawn washing up liquid, would fairy work just the same.
Sandra is correct, any cleaning solution seems to work, I used 1001 solution 40%/Hydrogen Peroxide 60% but do
NOT use water at all to dilute any part of either solution. I would never have believed the stain would vanish but it did!
A tip for new parents: this solution also works to remove urine stains from childrens bedding too, a friend has a 2yr old who had had an "accident" and it also vanished