I got several pieces of tupperware and over time my white lids from tupperware containers have stained and turned yellow how do I get them white again. I tried bleaching them for awhile but that didn't seem to help. Do you have any other suggestions?
This is usually a combination of age, grease and smoke. I put mine on the top rack of my dishwasher, and they almost never turn yellow although the color does go a little with age. Sometimes someone has given me a dish of something in a disgustingly yellowed container or lid, and if I run it twice through the dishwasher, it comes out almost like new!
You could also try soaking them with a little somewhat hot water, with either degreaser or descaler, and see what happens Also you could try spraying them (on newspaper) with oven cleaner, leave for a few minutes, then scrub and rinse with a scratchy sponge.
