Cleaning a Pyrex dish lid

We can see the mold. In my experience, the seals have been removable, but on this one, it doesn’t seem so, and I don’t want to force it.

How should I deal with this?

I would soak in peroxide and scrub with an (old) toothbrush, see if that cleans it out.
But I might also let it go and replace it with something easier to clean.

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In addition to what @grumpyspatient said, I might try sprinkling a little baking soda on it before using the toothbrush.

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Same, 100 percent. That is my move, too.

Buy a new Pyrex container.

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You can buy replacement Pyrex lids. Do a search, etc. YMMV.

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have you tried putting it through a dishwasher (not the drying cycle)? there are zillions of articles about this online I am sure you can deal with the danger from any mold, but the solutions may not correct the color, so how much does that aspect matter to you? Its a cheap item, a detailed cleaning routine might not be worth the effort to save this one lid, just be more careful in future.

+1 on dishwash. I put mine through all the time, top rack. Drying cycle too. No problems as far as I can tell.

One of the problems with these integrated lids. The more integrated they are, the easier they are to use in the beginning and the more difficult they are for the long-term use.

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my daughter is big on these containers but she was washing the lids by hand; we convinced her to run them through the dishwasher with no apparent harm to the lids and seals,

Even top rack dishwashing sheds plastics. The heat and ultra hot water does it. I can see washing them in the dishwasher but maybe not every time. In any case, can’t get away from plastics. Methinks modern plastics is like the lead lined Roman aqueducts…they knew lead was bad, and we know plastics are bad…but too lazy or dumb or cheap to fix it. Oh right…and a whole massive industry behind it. Never mind….

choose your poison, if its mold its more likely to affect you than a bit of plastic (assuming that the seal on the lid IS plastic; I think many are silicone. And is washing them in the sink with dishcloths and sponges and drying them with cloth towels you reuse any better than using a dishwasher (we do not use high heat) which rinses all the water away? we are still reusing plastic containers, like yogurt tubs for storage along with some glass (all of these have plastic lids these days) You can truly drive yourself mad since it seems that many maybe most industrial products are toxic or otherwise unhealthy to humans in some way - as are many normal foods we eat . I chose to focus on continuing to eat and cook good natural (not highly processed) food and ingredients and try to avoid the noise because every week there is something more that is killing us.

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I don’t know i’d use it for food again, but Clorox makes a bleach cleaner that takes care of black mold. Walmart Great Value is cheaper and stronger. Use it all the time here in the Southeast In the kitchen and bathroom where mold can grow overnight but not on cooking utensils

tip mold can get out of hand fast, especially in humid areas.
Agreed though, great for surfaces but I had keep it far away from anything food-related.

That is a very balanced take risk is everywhere, and you can not eliminate it all without losing your sanity.
Focusing on good food and reasonable habits instead of chasing every new scare is probably the healthiest choice.

I’ve gotten various sizes of silicone lids to replace old, cracking Pyrex lids….found them on Amazon, though certainly not the only source….

Anyone mention soaking in a 20% bleach-water solution?

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I like this idea… I’ve used a similar bleach water solution to clean an enameled cast iron dutch oven.

Absolutely, but to that I would add to avoid any risk if it can be avoided without undue challenges. Tossing plastic anything into a dishwasher will promote microplastic/nanoplastic shedding from water, heat, and agitation. Handwashing will cause some, too. Which causes less? I’m off to ask the Google.

PS The Google says for clothing, machine washing sheds more than handwashing. For dishes it is less clear cut. Avoid high heat/high intensity cycles for plastics.