How do I remove hard water stains from a Pyrex measuring cup?

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How to remove hard water stains From a Pyrex measuring cup?


  12 answers
  • Redcatcec Redcatcec on Feb 02, 2020

    Hi Debbie,


    You might try white vinegar. Or another way is to try CLR (calcium, lime, rust) acailable at diy stores.

  • Holly Lengner - Lost Mom Holly Lengner - Lost Mom on Feb 02, 2020

    I've heard that you can use denture tablets from the dollar store to remove hard water stains from glass.

  • FrugalFamilyTimes.com FrugalFamilyTimes.com on Feb 02, 2020

    Another vote for vinegar then CLR if that doesn't work. :)

  • Vinegar should do it. If they are tough deposits, you may have to scrub with a plastic scrubber.

  • Linda Sikut Linda Sikut on Feb 02, 2020

    Hi DebbieS,

    I have a similar issue and decided to check out the options given to you so far. I definitely will try vinegar, but when I looked up if CLR is safe on glass, I found that the manufacture says not to use it on glass because it's corrosive. I thought that would be good for you to know. I'm going to try the white vinegar. Wishing you the best.

  • Vimarhonor Vimarhonor on Feb 02, 2020

    Hello theCLR, lime away, whink cleaning solutions will help descale your cup.

    I recently used Whink and it was by far the easiest experience removing hard water stains. I used it on my hot pot— crusty bottom interior mineral build up and on the underside of my kitchen faucet where the aerator gets crusted and clogged. It worked effortlessly and quickly. I hope this helps!


  • Chloe Crabtree Chloe Crabtree on Feb 02, 2020

    First, add warm water to the Pyrex. Add an unused dryer sheet to the water, then let it sit for around 15 minutes. Dump the water, then wipe the greasy or caked-on areas with a wet sponge. Just make sure you clean the dish with soap and water when you're done.

  • Gathered In The Kitchen Gathered In The Kitchen on Feb 03, 2020

    Shaklee Scour Off to the rescue for hard water!!! Grab a container of the most magical heavy duty cleaning paste here—-> https://bit.ly/2BotgsS



  • Here is how to remove hard water stains from glass: https://www.youtube.com/watch?v=tRmhvZpPSQQ

  • Kmdreamer Kmdreamer on Feb 06, 2020

    White vinager soak it or clean it with comet

  • Deb K Deb K on Feb 08, 2020

    Hi DebbieS, the easiest way to remove hard water stain is with vinegar, fill the glass with vinegar and let it sit for about 1-2 minutes, rinse well and hard water marks should be gone! Repeat if necessary, also , keep a container so you can reuse the vinegar on other projects. Hope this helps you out!


  • Gathered In The Kitchen Gathered In The Kitchen on Feb 24, 2020

    try soaking it with vinegar and water mixture. Use a toothbrush to scrub off the hard water stains. You can also try baking soda