I wouldn't. I have heard stories of people who put cake pans in the dishwasher, and they lost their shine and finish. I like mine to be shiny and easy to use, and if they lose the smooth finish, I think they'd be harder to clean the next time.
I use parchment paper on my cookie sheets also, so they're not hard to wash off - maybe a bit greasy, but nothing baked on.
I get the parchment at GFS (Gordon Food Service). 50 pieces that are sized to fit full sheet pans are less than $4.00, and I think the cookies bake more evenly with it, plus I don't have to worry about breaking them when I get them off the cookie sheet.
I know, that's more than you asked for, LOL, hope some of it helps!
Laura.
Quote by @%username% on %date%
%body%