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Aug 14, 2013 09:31 AM

Strange Silicone Mold Odor Problem

A couple of years ago, Wahine bought me two of the W-S black silicone icecube molds, the kind intended for making "big" cubes for cocktails. They basically live in the reefer's freezer section, and work just fine. I took them both out last night because some ice had sublimated away, and I thought I'd give them a wash.

The problem? They now smell like an ashtray. We don't smoke, nor do we allow smoking in the house. A soak overnight in baking soda water did not solve the problem, so now I'm trying vinegar.

Anyone else have this problem? Any solutions for deodorizing would be appreciated.


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  1. I'm not certain if this is the same problem, but:

    This reminds me exactly of the Tovolo perfect cube and King cube problem. People bought them and either from the get go or most reported over time that the silicone that was used slowly broke down in the freezer and started to smell strongly; most say that it smells chemical, but there are reviews with other descriptions of scents. If you read 1-2 star Amazon reviews on these you'll find a lot of comments about it.

    2 Replies
    1. You could also try to boil with baking soda for 15 minutes. We've done that with silicone baby bottles to remove odor, with some success.

      I should clarify that this solution worked better for us than simply soaking in baking soda water or using a vinegar solution.

      2 Replies
      1. re: pharaohes

        OK, after the vinegar, that's next on my list. Thanks!

        1. re: pharaohes

          I'll have to use this method the next time my silicone cake mold starts getting imparted flavours.

          Thanks for the tip!

        2. it is from the charcol filter in the freezer... a soak if vineagar doent do it... try putting them in the sink with some orange juice and tomato juice over night.

          1 Reply
          1. re: girloftheworld

            That makes a lot of sense, have you had this problem before?

            It's interesting to know what makes this happen.

          2. Update:

            Soaking in water with baking soda: STRIKE ONE
            Soaking overnight in vinegar: STRIKE TWO
            Boiling for 30 minutes with baking soda: STRIKE THREE

            The first two did nothing. The boil caused the whole kitchen to smell almost as foul as the trays, and the discard water was every bit as smelly as the trays, so at least some of the odor came out (but not much). How something so small and thin can continue to smell *so* bad after all of this just from being in the freezer is a little alarming. After this all leftovers >1 week old are getting tossed, too.

            I may try a few more boils because these trays were pricey.

            The take-home here is not to leave any silicone molds in the freezer. Turn out the frozen item as soon as it freezes and store the molds elsewhere.

            2 Replies
            1. re: kaleokahu

              That's really too bad to hear Kaleo, I hope the future boils work out for you.

              "The take-home here is not to leave any silicone molds in the freezer. Turn out the frozen item as soon as it freezes and store the molds elsewhere."

              I couldn't agree more. I'm sorry you had to find this out this way.

              I hope your trays clean up and that's too bad about the leftovers.

              1. re: kaleokahu

                I'm sorry to hear that. It's interesting that the boil made your kitchen smell. did you use a new box of baking soda? I've boiled quite a few things and my kitchen/discard water never smelled of anything but baking soda. I also sometimes make a thick paste of baking soda and water and apply it liberally to the silicone bottles. Then I'll dump them in the boiling water and then after the bubbles subside, pour in a lot more - like half a box. I hope that subsequent boils/kitty litter work for you!

              2. AHA! (perhaps)

                The Google supplied this supposed fix:

                This will be my final attempt. Since the silicone trays now smell worse than USED cat litter, what's there to lose?


                1 Reply
                1. re: kaleokahu

                  There really isn't anything to lose.

                  His review is really funny and informative, I hope his kitty litter fix works.