How do you get clear Pyrex baking dishes all sparkly clean again?

Oven cleaner, follow the directions on the can.

Pyrex Baking Dishes

Pyrex Dishes

I've found that steel wool (like SOS pads) will do the trick every time. A little work, but it does remove the sludge that builds up (from a gas oven). Both Da Lady and Dr. F's answers will work well too, they're just a bit more caustic in nature.

To choose best answer, you have to wait until the end of the day, YA has a open question time limit, before you can choose best answer (I'm not sure how many hours this actually is). Then go to your profile page, click on the 'My Questions' link, a link to your question will be there. Once you see the blue 'choose best answers' boxes, you can make your choice.

Easy Off oven Cleaner works by far the best, I have all my Pyrex dishes in clear glass (9 to be exact) and I have found that this product is the only one that works. The glass does not etch and it even cleans the corners which are next to impossible to get clean and clear, remember to NEVER use Brillo or anything scratchy.

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RE:

How do you get clear Pyrex baking dishes all sparkly clean again?

You know how there's that transparent brown sludge'y stuff that never comes off, no matter how hard you scrub? Isn't there something that will cut thru it and dissolve it? Thanks in advance, and I'd like to give someone 10 pts if they give me a solution that works, but I don't...

And yet again another use for my favorite multi-use cleaning product," Barkeepers friend". First wet the dish and sprinkle cleanser and work in a firm circular motion (I prefer a dish washing brush) rinse and repeat if necessary,this is tried and true it will even remove baked on gunk from the stove. Happy cleaning!! Oh by the way you can find this at K-mart and some grocery stores. It's totally safe on glass.

Place the cookware that you're wishing to treat into your sink, and sprinkle a liberal amount of Powdered Dishwasher Detergent into the stained dish. Add just enough water to cover the detergent (which will transform the powder into a slick paste), and spread the thickened solution onto the areas of burned residue. Allow several hours for the chemistry to do its work. You may wish to occasionally check the process to ensure that the paste has remained moist. If not, simply sprinkle a small amount of water onto it and re-spread the paste. Use a scrubber to 'encourage' the remaining softened material from your item. WARNING: The paste is fairly caustic and produces strong vapours, so the wearing of gloves is recommended. And be wary of the fumes. I cannot stress the importance of NOT underestimating the strength of the fumes. While they will remain localised, they are dense and powerful.

Ah, the wonders of household chemistry.

Personally, I have one myself, and I use a razor scraper, and go in downward strokes for the sides, and always away from you so you don't get cut.

with your detergent add a 1/2 cup of white vinegar , you will notice the difference