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How to Keep your Pyrex Glassware Sparkling Clean

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Casseroles, pasta dishes, tarts, pies and chicken dishes are often cooked to delicious success in Pyrex glassware.

My special Mac and Cheese simply doesn’t taste as good if I don’t bake it in the very square Pyrex dish my mother used more than 40 years ago.

Yes, Pyrex lasts long if you look after it. But it tends to get a bit grimy looking, so we are going to find some good tips to help you clean up your glassware.

History of Pyrex

Pyrex was developed by Corning Glass Works in 1915, in Corning New York, USA. By 1919, Corning had sold over four million pieces of Pyrex to consumers across America from a line that included 100 dish shapes and sizes.

Use Pyrex Safely

Although it can seem indestructible, always remember that Pyrex is made of glass, which can experience thermal shock when it’s exposed to sudden temperature swings. And that thermal shock can make the glass expand and contract, making the dish shatter or explode if the change in temperature is extreme enough.

On its website, Pyrex cautions, “Uneven heating, direct contact with heating elements, and sudden temperature changes (hot glassware coming in contact with something cool or wet, or cold glassware coming in contact with something very hot) can cause glass to shatter or break.”

Pyrex also recommends preheating your oven before placing the glass dish inside so that it isn’t exposed to a big change in temperature and to always let Pyrex come to room temperature before placing it in an oven, freezer, or refrigerator.

Please note, that, Pyrex plastic ware, including the plastic lids that come with the glassware, are not oven-safe. The plastic lids are designed for storage only and will melt if you put them in the oven.

The Pyrex brand has a well-earned reputation for producing extremely durable products, which commonly serve home cooks for decades at a time.

But even as durable as Pyrex can be, it isn’t immune to messes, scratches, and other imperfections!

How to Get the Baked-On Stains off Your Pyrex

Are your Pyrex baking dishes looking a little worse for wear? No matter how well you wash your dishes, in the dishwasher or by hand, there always seem to be stubborn, burnt in stains that just don’t go away.

Pyrex is just like all glass cookware and you need to be careful the grease build up. Over time Pyrex can become stained with brown and yellow-ish grease stains that are difficult to remove, but not impossible.

Here are a few tricks that will remove those pesky stains.

Baking Soda and Dish Soap

Coat the bottom of your Pyrex dish with baking soda and a drizzle of dish soap. Add hot water and let the whole mixture soak for about 15 minutes. Then, grab a plastic or nylon sponge to scrub away the stains.

You can use the same ingredients and just switch up the technique:

  •  Moisten the sponge or soft cloth with water.
  •  Pour a couple teaspoons of baking soda onto the cloth or directly into the glass cookware.
  •  Scrub the burnt areas with the baking soda and soft cloth until they are removed.
  •  If the stains remain, rinse with water.

This method adds ammonia to the mix to remove those burnt stains:

  • Moisten the sponge or soft cloth with water.
  • Pour a couple teaspoons of baking soda onto the cloth or directly into the glass cookware.
  • Scrub the burnt areas with the baking soda and soft cloth until they are removed.
  • If the stains remain, rinse with water.
  • Spray the surface with ammonia.
  • Scrub again with a soft cloth.
  • Rinse and repeat if necessary.
  • Once clean, wash the item as usual to remove any cleaning residue.

Additional Tips and Advice

If you need more scrubbing power, try a nylon scrubbing pad. They won’t scratch the glass, but offer more cleaning power than a soft cloth.

If you don’t want to scrub, use a denture cleaner instead. Simply fill the pan with water, then drop in a denture tablet and allow it to fizz as long as needed.

If the pans are really bad, place them in a big plastic bag (like a rubbish bag), fill it with enough ammonia to keep the dishes wet, tie it off and let them sit overnight. In the morning remove the dishes, dispose of the ammonia and the marks should rub right off.

An alternative to using ammonia is to use lemon. Fill the pan with water, put in a sliced lemon, and bring the water to a boil. Let it simmer for a few minutes, then cool the dish and scrape off the softened residue.

But what if you’ve tried everything and your Pyrex simply refuses to come clean? For your last-ditch effort, consider trying a bit of oven cleaner.

Visit our Household Plastic stores for a great range of Pyrex Glassware. Take a look in our Kitchen Department and you will find everything you need to prepare, preserve and plate delicious meals.

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