Over time, oven heat, if the pans were regularly put in the oven, would dull the shine of Bakelite, too. Most of the women who had dishwashers were thrilled that the pans could go into the machine and did not worry about the handles. Cast iron skillets were about the only cooking utensil that did not go in. It was amazing how fast, once a family got a dishwasher, that the copper bottoms on cookware stopped being polished after every use. It probably was not just the dishwasher, but the loss of the novelty of the shiny copper and the whole, "I'm too old for this" attitude put an end to the polishing. I watched neighbors who had the Cameo under the sink and always pulled it out as the last step before rinsing the pan when doing dishes by hand and after they pulled the clean, dry pans out of the dishwasher, it was like starting all over again to polish the copper.