Who makes the best sharpening steel? I have two, one from Chicago Cutlery, which was never too good and I think is worn out (does that even happen?) and the other is from Haverhills (also ancient). Neither one seems to get any 'bite' anymore, even on a newly sharpened knife.
I've seen newer ones that are diamond, or ceramic, or even one that looks as if it's flat, not round. Which are the advantages/disadvantages of different materials? Which are best for the knives?