You should wash all new baby clothes before your little one wears them, ideally about four to six weeks before your due date. New clothing comes with chemical residues from manufacturing that can irritate a newborn’s sensitive skin, and pre-washing is the simplest way to remove them.
Why New Baby Clothes Need Washing First
New clothes aren’t as clean as they look. The textile industry uses a wide range of chemicals during manufacturing, including dyes, flame retardants, pesticides, and plasticizers. One of the most common is formaldehyde, which has been used in fabric production since the 1920s to reduce wrinkling, fix dyes, prevent mold, and aid in bleaching. It’s found in cotton, polyester, and blended fabrics alike.
For adults, these trace chemicals rarely cause noticeable problems. But a newborn’s skin is thinner, more permeable, and far more reactive. Formaldehyde in clothing is associated with dermatitis, eczema, allergic reactions, and sensitization at the contact site. Even beyond formaldehyde, the dye-fixing resins and other finishing agents in fabric are known triggers for contact dermatitis in children, and pediatric dermatologists have noted an increase in skin reactions from textiles in recent years.
The signs of irritation can range from mild redness and dry, flaky patches to more obvious reactions like small blisters or raised, itchy spots, typically appearing wherever the fabric sits against skin. In babies, these reactions tend to show up in areas where clothing fits snugly or where sweat collects in skin folds. A single wash with a gentle detergent removes the bulk of these surface chemicals and significantly reduces the risk.
The Best Time to Wash Before Birth
Aim for four to six weeks before your due date. This window gives you enough time to get everything laundered, dried, folded, and put away without the stress of a looming delivery. It’s also close enough that the clothes won’t sit for months collecting dust before the baby arrives.
If you wash too early, say at 20 weeks, the clothes may need a second wash by the time your baby is here, especially if they’ve been stored in open drawers or exposed to household dust. If you wait until the final week or two, you risk running out of energy or being caught off guard by an early arrival. The sweet spot is somewhere around weeks 34 to 36 of pregnancy for most people.
What to Wash and How
Wash everything that will touch your baby’s skin: onesies, sleepers, socks, hats, burp cloths, swaddles, blankets, crib sheets, and cloth bibs. If it came in packaging from a store, it has manufacturing residue on it. Secondhand clothes should also be washed, both for chemical residue and general hygiene.
Use a detergent that is free of added fragrances and dyes. You don’t necessarily need a specialty “baby detergent,” though those are formulated to be gentle. A fragrance-free, dye-free regular detergent works well for most babies. The more important step is avoiding fabric softeners and dryer sheets, which contain chemicals and synthetic fragrances that commonly irritate infant skin. If you want to test how your baby reacts to a particular detergent, wash a single item first and let your baby wear it for a day before laundering everything else with the same product.
One exception worth noting: cloth diapers should be washed separately from regular laundry. Harsher detergents can leave residue on the diaper fabric that leads to diaper rash, and cloth diapers often need a specific wash routine to stay absorbent.
Storing Clean Clothes Until Baby Arrives
Once everything is washed and fully dried, how you store it matters. The goal is keeping the clothes clean and protected during the weeks between washing and actual use.
- Sort by size and type. Group clothes by newborn, 0 to 3 months, and 3 to 6 months so you can grab what you need quickly. Separating by category (sleepers, everyday outfits, accessories) saves time during those first chaotic weeks.
- Choose the right container. Plastic bins with lids, vacuum-sealed bags, or cotton storage bags all work well to keep out dust, moisture, and pests. Dresser drawers are fine for items you’ll use in the first few weeks.
- Pick a good storage spot. A clean, dry, temperature-controlled room is ideal. Avoid basements, attics, and garages, where humidity and temperature swings can encourage mildew or attract insects.
- Don’t overstuff. Fold items neatly and leave some room in each bin. Overpacking creates deep wrinkles and makes it harder to find what you need.
For clothes your baby won’t wear for several months, layering acid-free tissue paper between items or adding a cedar block to the container helps preserve the fabric and deter pests.
Keeping Up With Laundry After Birth
Pre-washing is the most critical step, but the same principles apply once your baby is home. Continue using fragrance-free, dye-free detergent and skip the fabric softener. You can wash baby clothes with the rest of the family’s laundry as long as everyone’s load uses the same gentle detergent. Some parents prefer to keep baby items separate for the first few months, which is a reasonable precaution if your baby has especially reactive skin or if other family members use scented products on their own clothing.
Any time you buy or receive new clothes after the baby arrives, wash them before first use. This applies to gifts, hand-me-downs, and anything pulled out of longer-term storage. The chemical residues on new garments don’t diminish just from sitting on a shelf, and stored clothes can pick up dust, mildew, or pest residue over time.