Shopping·3 min read

I Know What Is and Isn't in my Laundry Detergent, Do You?

proofed laundry detergent sheets and stain remover
Design: theSkimm | Images: Alexandra Napoli
December 12, 2025

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Welcome to Skimm Tested, a series where we put viral products to the test and give you our honest, unfiltered reviews.

What I Tested…

  • The Proofed! Starter Kit, $18.99

  • Use code SKIMM20 for 20% off your order (expires December 31)

Why I Tested…

Why I Tested

Test Results…

  • Effectiveness. These detergent sheets and stain remover work exactly as expected. I was very pleased with the results and the state of my clothes, towels, and bedding after washing. Anything that went into the laundry came out clean: Stains were gone and odors were eliminated thanks to the five enzymes that work together. I also experienced no residue when I used the sheets correctly (place one to two sheets into an empty washing machine before loading laundry on top). 

  • Ingredients. I love that the formula is plant-based. It brings me such peace of mind to know that the products I use in my home are rid of plastics, parabens, formaldehyde, phthalates, and more. These are items I touch every day — clothes, towels, washcloths — so I really want to make sure I’m aware of what’s being used to clean them.

  • Stain remover. This spray works on all types of stains: oil, sweat, grass, dirt, blood, ketchup — you name it. You can use it on its own, but I suggest spraying on standout stains before washing for maximum effect. Like the sheets, five enzymes work together to lift whatever is trying to set into clothes. 

  • Price. One package contains 32 sheets, so that comes out to be around 41 cents per sheet. For a medium-sized load, one sheet is enough. If you’re doing a large load, Proofed! recommends two, but more often than not I only used one. That’s a pretty good price per use.

Sidenotes…

  • The only time I experienced a residue on black clothes was when I accidentally placed the detergent sheet on top of a pile of clothes. One pair of black sweatpants came out with a white residue so I ran them again and the residue was gone.

The Fine Details…

  • The Proofed! Starter Kit, $18.99

  • Use code SKIMM20 for 20% off your order (expires December 31)

  • Detergent sheets come in three options: fragrance-free, clean scent, and sport scent

  • Dermatologist-tested

  • USDA Certified BioBased Product

  • Leaping Bunny Certified

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