Costco Laundry Products Worth Skipping (And What to Use Instead)

Laundry products deserve particular attention because what you use to wash your clothes can leave residues on fabric, contribute fragrances and chemical compounds to indoor air, and affect what you and your household are exposed to throughout the day.

None of this requires replacing everything in your laundry room immediately. A more practical approach is to identify what you use most frequently and find simpler alternatives when it’s time to replace them. Here are three laundry-related purchases I’d personally skip at Costco, and what I’d choose instead.

1. Downy Ultimate Fusions

Scent boosters are designed to make laundry smell stronger and maintain that “fresh laundry” scent long after the wash cycle ends. That’s essentially the entire point of the product, and that’s where the concern starts.

Fragrance formulations can contain numerous individual ingredients that aren’t fully disclosed on the label. When you add a scent booster to an already-fragranced detergent, you’re intentionally increasing the amount of fragrance deposited on your clothing. And your clothes spend hours against your skin: bedding, pajamas, towels, underwear, and everyday wear. For people sensitive to fragrance, this can contribute to headaches, respiratory irritation, or skin reactions.

What I’d choose instead: baking soda

Baking soda helps neutralize odors and is inexpensive enough to use freely. Add a small amount directly to the washing machine alongside your regular detergent. It won’t replicate the intense fragrance of a commercial scent booster, and that’s the point. Clean laundry doesn’t need to smell like perfume.

The most effective swap here is often simply removing scent boosters from the routine entirely. They’re adding fragrance and little else.

2. Conventional Laundry Detergents

Conventional laundry detergents can contain surfactants, enzymes, fragrances, preservatives, dyes, optical brighteners, and other additives designed to improve performance, appearance, scent, and shelf stability. If you’re trying to minimize unnecessary chemical exposure, laundry detergent is worth evaluating because it’s used frequently, and residues can remain on fabric after washing.

Two specific ingredients worth looking at:

Fragrance. Laundry fragrance can persist on clothing and bedding after the wash cycle, meaning exposure continues throughout the day. For people with sensitive skin, fragrance is a common trigger for irritation and allergic contact dermatitis. Respiratory symptoms can also occur in susceptible individuals. Removing fragrance from the laundry routine is a reasonable first step for anyone experiencing unexplained skin or respiratory reactions.

Optical brighteners. These don’t make clothing cleaner; they work by altering how light reflects from fabric, making whites and colors appear brighter. If your goal is a simpler laundry routine with fewer unnecessary ingredients, these are worth skipping.

What I’d choose instead: ECOS Laundry Detergent

ECOS offers plant-based formulations and genuinely fragrance-free options, one of the more straightforward swaps available in this category. It cleans effectively, comes in concentrated formulas (so a smaller amount goes further per load), and has a more transparent ingredient list than most mainstream brands.

When shopping for any detergent, don’t assume “plant-based” or “natural” means every ingredient is harmless or that the product will work for everyone. Read the ingredient list and look specifically for fragrance-free options if that’s the priority.

3. Front-Loading Washing Machines

This one is different from the others; the concern isn’t the machine’s materials, it’s a design issue that affects what grows inside it.

Front-loading washing machines can be highly efficient in terms of water and energy use. But their design creates a closed environment where moisture can remain trapped, particularly around the rubber door gasket. Water, detergent residue, lint, and hair accumulate in the folds of the seal. When the door is closed immediately after a wash cycle, the interior stays damp, sometimes for hours.

That’s an environment where mold and mildew can grow. If you’ve opened a front-loader and noticed a musty smell, you’ve encountered this problem. That odor can transfer to freshly washed laundry, which undermines the point of washing it.

To be clear about the health framing: mold can cause allergic and respiratory symptoms in susceptible individuals, and certain molds produce mycotoxins under specific conditions. The concern is straightforward: a damp, dirty washing machine isn’t what you want in your laundry room, and the odor transfer issue is real and annoying.

What I’d consider instead: a top-loading washer

Top-loaders don’t have the large front-door gasket where water typically collects, which makes routine drying and maintenance more straightforward. This doesn’t mean top-loaders are immune to mold; any machine can develop buildup without proper maintenance, but the design makes the problem less common and easier to manage.

If you have a front-loader, these habits make a significant difference:

• Leave the door open between cycles so moisture can evaporate
• Wipe down the rubber gasket after each use
• Clean the detergent dispenser regularly (residue builds up there, too)
• Run the manufacturer’s cleaning cycle at the recommended intervals
• Use the correct amount of detergent; excess builds up and contributes to the problem

The Bigger Point: Simplify the Laundry Routine, Don’t Just Swap Products

The better approach for a lower-toxin laundry room is to step back and ask which products are actually necessary.

Do you need a scented booster on top of detergent? Probably not. Do your clothes need to smell strongly fragranced to be clean? No. Could you use less detergent and get the same results? Overuse is almost certainly one of the most common laundry mistakes. Could you reduce machine odor by leaving the door open after each cycle? Immediately, yes.

Frequently Asked Questions

Are laundry scent boosters like Downy bad for you? Scent boosters add concentrated fragrance to clothing that remains in contact with skin throughout the day. Fragrance formulations often contain numerous undisclosed individual compounds, and some fragrance ingredients have raised questions about skin sensitization and respiratory effects in susceptible individuals. The concern isn’t that they’re definitely causing disease; it’s that they add significant fragrance exposure to an already-fragranced laundry process without providing any cleaning benefit. For most households, removing them from the routine is the simplest way to reduce.

What laundry detergent should I use instead of conventional brands? ECOS is a commonly recommended alternative for people moving toward a lower-fragrance, plant-based laundry routine. It offers genuinely fragrance-free formulations, uses plant-based surfactants, and comes in concentrated versions that are more economical per load than their sticker price might suggest. When evaluating any detergent, read the ingredient list rather than relying on front-label terms like “natural” or “eco-friendly,” and prioritize fragrance-free if skin sensitivity or fragrance reduction is the goal.

Do conventional laundry detergents contain harmful chemicals? Many conventional detergents contain fragrance, optical brighteners, dyes, and preservatives that aren’t strictly necessary for cleaning. Some fragrance ingredients have raised toxicological questions, and optical brighteners remain on fabric after washing without providing any cleaning function. The more useful question is whether you can achieve the same cleaning result with a simpler ingredient list, and in most cases, you can.

Why do front-loading washing machines get moldy? Front-loaders have a rubber door gasket designed to create a watertight seal during the wash cycle. Water, detergent residue, lint, and debris accumulate in the folds of this gasket. When the door is closed after a cycle, the interior remains damp, sometimes for extended periods, creating ideal conditions for mold and mildew growth. Leaving the door open between cycles, wiping down the gasket after use, and running regular cleaning cycles are the most effective ways to manage this issue in a front-loader.

Is a top-loading or front-loading washer better for health? From a mold and moisture management standpoint, top-loading machines are generally easier to keep dry between cycles because they don’t have a large sealed rubber gasket that collects moisture. Front-loaders can be more efficient with water and energy, but their design requires more diligent maintenance to prevent mold buildup. Either machine type can develop problems without proper care, but the top-loader’s design makes mold-related issues less common and easier to address.

How can I remove the musty smell from my front-loading washing machine? Start by wiping the rubber door gasket thoroughly with a damp cloth, paying attention to the folds where buildup tends to collect. Remove and clean the detergent dispenser. Run a hot-water cleaning cycle using either a dedicated washing machine cleaner or a cup of white vinegar. In the future, leave the door ajar between cycles to allow moisture to evaporate, and use the correct amount of detergent; excess detergent is a primary contributor to buildup and odor.

References:

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