f your towels have gone from fluffy to flat, your white sheets have a dingy gray cast no matter how much detergent you use, or your baby's "clean" onesies still smell faintly sour right out of the dryer — you don't have a dirty laundry problem. You have a buildup problem, and regular washing isn't going to fix it.
That's what laundry stripping solves. It's a deep-clean method that pulls years of accumulated detergent residue, fabric softener film, hard water minerals, and body oils out of fabric fibers — stuff your everyday wash cycle simply isn't strong enough to remove. Here's exactly how to do it naturally, using mineral ingredients instead of harsh chemical strippers.
Good news if you'd rather not add a shopping list to your laundry room: since Sunday Wash's mineral blend already contains the same core minerals (sodium carbonate, sodium bicarbonate, sodium borate) that show up in classic stripping recipes, most households can strip laundry with nothing but Sunday Wash, just at a stronger dose than a normal wash. Below we'll walk through that Simple Method first, then cover an Extra-Strength add-on for the toughest cases — years of buildup, very hard water, or your very first strip.
What Is Laundry Stripping, and Why Does It Work?
Every time you wash a load, a small amount of detergent residue, fabric softener, and hard-water minerals (calcium and magnesium) doesn't fully rinse out — it stays trapped in the fibers. Over weeks and months, that residue builds a film that:
- Makes towels feel stiff or "crunchy" instead of soft
- Traps odor-causing bacteria, so towels smell musty even when freshly washed
- Reduces absorbency (a towel that doesn't actually dry you off anymore)
- Dulls white fabric to a gray or yellow tint
- Makes baby clothes and cloth diapers less effective at wicking moisture
Laundry stripping uses a hot-water soak with mineral cleaning agents to pull all of that trapped residue out at once — you'll often see the soaking water turn visibly gray, brown, or cloudy as the buildup releases. It's oddly satisfying, and for most households, it's a genuine wake-up call about how much was hiding in "clean" laundry.
Who benefits most from laundry stripping:
- Hard water households (buildup accumulates faster)
- Families who've used fabric softener or dryer sheets regularly
- Cloth diaper users (residue reduces absorbency, which matters a lot here)
- Anyone dealing with musty towel smell that survives a normal wash
- Households switching from conventional to natural detergent for the first time (a strip gives your new mineral detergent a clean slate to work with)
What You'll Need
The Simple Method (most households, start here)
- A bathtub, large basin, or front-loading washer drum (top-loaders work too, but a tub gives you the most dramatic — and satisfying — results)
- Hot water (as hot as your tap or water heater will safely provide)
- Sunday Wash mineral laundry powder — 2 to 3 cups for a full bathtub soak. That's noticeably more than a normal wash-cycle scoop on purpose: a passive multi-hour soak needs more concentrated mineral power than a 30-minute agitated wash cycle to get the same result.
- A stirring implement (a clean pool noodle, wooden spoon, or dedicated "laundry stripping stick" works well for tub stripping)
- 4–6 hours of soak time (or overnight)
Use this for a regular maintenance strip (every 4–8 weeks) or moderate buildup. A quick way to check if it's working: your soak water should start turning visibly cloudy or gray within the first hour or two. If it doesn't, that's your cue to add the boosters below next time.
The Extra-Strength Method (heavy buildup, very hard water, or your first-ever strip)
Add to everything above:
- Washing soda (sodium carbonate) — 1/2 cup
- Borax or a sodium borate laundry booster — 1/4 to 1/2 cup
These push the water's alkalinity and softening further than a practical dose of Sunday Wash alone can — worth it for years of accumulated residue or genuinely hard water, but not something most households need for a routine maintenance strip.
A quick honesty note on dosing: we haven't lab-tested an exact equivalency between the Simple and Extra-Strength methods — the amounts above are a practical starting point, not a guaranteed formula. If the Simple Method isn't producing cloudy soak water for you, that's a sign to add the boosters next time, not a sign anything's wrong with your machine or your towels.
Step-by-Step: How to Strip Laundry Naturally
Step 1: Sort your load
Strip similar fabrics together — towels with towels, sheets with sheets, cloth diapers with cloth diapers. Avoid mixing delicates or anything with elastic (elastic doesn't love extended hot soaks) into the same batch as heavy-duty items like towels.
Step 2: Fill your tub or basin with hot water
Fill it enough to fully submerge your laundry with room to move around — usually most of the way full for a standard bathtub. The hotter the water, the more effectively the minerals can dissolve and lift trapped residue, so use the hottest water your setup safely allows.
Step 3: Add your mineral ingredients
Measure out your Sunday Wash (2–3 cups for the Simple Method) and add it directly to the hot water, stirring until fully dissolved — you don't want undissolved granules sitting directly against fabric. If you're doing the Extra-Strength Method, add the washing soda and borax at the same time. Either way, the goal is the same: the minerals lift soil and residue, the alkalinity cuts through oils and grease, and the water-softening keeps buildup from re-binding onto the fabric mid-soak.
Step 4: Submerge your laundry and stir
Push your items down into the solution so they're fully submerged, then give everything a good stir to work the solution through the fibers. Don't be surprised if you feel resistance from stiff towels at first — that's the buildup you're about to remove.
Step 5: Soak for 4–6 hours (or overnight)
Stir every hour or so if you're around to do it — this helps release trapped residue faster and more evenly. You'll likely notice the water changing color as buildup lifts out of the fabric. Grayish, brownish, or cloudy water is completely normal and honestly the most satisfying part of the whole process.
Step 6: Wring and rinse
Drain the tub, wring out excess water from each item, then run everything through a normal wash cycle with hot water and no additional detergent (the fibers are already clean — you're just rinsing). Some people run two rinse cycles to be thorough, especially for heavily soiled loads.
Step 7: Dry as usual
Skip the dryer sheets and fabric softener this time (and going forward, if you can help it — they're a major contributor to the buildup you just removed). Dry as normal and enjoy towels that actually absorb water again.
How Often Should You Strip Laundry?
For most households, stripping towels and sheets every 4–8 weeks keeps buildup from accumulating significantly. Hard water households, cloth diaper users, or anyone who recently switched from fabric softener may want to strip more frequently at first (every 2–4 weeks) until buildup is fully cleared, then settle into a maintenance schedule.
Once you've switched to a mineral-based detergent for regular washing, you'll likely find you need to strip far less often — mineral detergent doesn't leave the same residue behind that conventional detergent and fabric softener do, so buildup simply doesn't accumulate as fast.
A Few Things to Avoid
- Don't mix borax-based stripping solutions with chlorine bleach — stick to one or the other, never combined, for safety.
- Don't strip delicate fabrics, wool, or anything hand-wash-only — the extended hot soak isn't gentle enough for these.
- Don't skip the rinse cycle — residual mineral solution left in fabric can feel stiff until it's fully rinsed out.
The Bottom Line
Laundry stripping isn't a gimmick — it's a legitimate deep-clean method for pulling out the buildup your regular wash cycle can't touch, and doing it with mineral ingredients means you're not introducing harsh synthetic strippers into the process. Once your laundry is buildup-free, switching your everyday detergent to a mineral-powered, fragrance-free formula keeps it that way.
Ready to try it? Most households can start with what's already in the laundry room — shop Sunday Wash mineral laundry powder and measure out a strong dose for your first soak. Dealing with years of buildup or seriously hard water? Add washing soda and borax from the Extra-Strength Method above.
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