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Soak, Scrub and Heat it Up: Can You Microwave a Sponge?

Modified: May 10, 2022 by Jennifer Lane · This post may contain affiliate links ·

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Green yellow sponge on white background.

Simply put, usually, YES! And you should! Follow our simple guide to microwave sponges safely.

Sponges often hold onto some of the bacteria they scrub away, and microwaving is a great way to keep them clean!

Materials: Safe and Unsafe Sponge Types

Do NOT Microwave:

  • Sponges with any metal or steel-wool components! Metal components are never microwave-safe.

Do Microwave:

  • “Cellulose” (porous, with visible holes) sponges are made of foam components or plant fibers.
  • Scrubs (those with one uniform soft and one rough side) are also made of foam/plant material.
  • Foam/plastic composite sponges with plastic wool-like fibers
Bunch of colorful sponges on pink background

How To:

  • Briefly rinse your sponge before microwaving, using only water, not soap or a cleaning solution.
  • Make sure your sponge is completely saturated in water, not dry!
  • Dry sponges may burn, be sure yours is damp before microwaving!

How Long:

  • Most sponges will be clean and dry within one minute, less for higher power microwaves.
  • Dry/clean time also depends on the type and size of sponge:
  • Cellulose/more porous sponges may take up to 2 minutes
  • Thinner/scrub sponges should take a maximum of 1 minute
  • If thick steam is visible or obscuring the microwave, this is a good indicator that your sponge is ready to be removed!

Remember: use caution when removing the sponge or let it sit; it will be hot!

Use your microwave to keep your sponges squeaky clean & sanitary.
We hope you’ve soaked up a tip or two for safely microwaving your sponges.

If you are looking for ways to keep your microwave clean, read our reviews of the best microwave cleaners.

Sources:
https://www.goodhousekeeping.com/home/cleaning/a18731/how-to-clean-a-sponge/
https://www.npr.org/sections/thesalt/2017/09/11/548926054/can-you-really-not-clean-your-kitchen-sponge

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    Can You Microwave Bamboo Plates (Answered!)

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Safety Warning:

Always use extreme caution when using your microwave. Never leave a microwave unattended while in operation.  If you see sparks or hear unusual sounds coming from your microwave immediately stop the microwave.  All microwaves are different and cook with different power, adjust accordingly.  These articles are for informational purposes only and are not intended as advice.  Always consult your user manual before putting anything in your microwave.  Use your microwave oven only for its intended use as described in the instruction manual.

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