How to Wash Reusable Diapers

Washing reusable diapers is much easier today than it was in our parents’ generation. Store used diapers, except wool items, in a covered bucket or a PUL wet bag. Every one to three days, transfer them to the washing machine, use the detergent dose recommended for heavily soiled laundry, wash correctly and hang to dry.

1. Bucket, wet bag and odour control

Choose a lidded bucket large enough for at least two days of diapers, or use a breathable, waterproof PUL wet bag. A 50 × 55 cm bag holds about two days’ worth, a 42 × 30 cm zip bag is useful when out, and a 15 × 18 cm bag holds one diaper. Avoid single-use plastic bags. A few drops of tea tree or lavender oil may mask odour, but they do not replace proper washing or disinfection.

2. Removing stool and treating stains

Wet diapers and diapers soiled only with milk-fed stool can usually go directly into the bucket for up to two or three days. Once a child eats solid food, shake solids into the toilet or remove the disposable liner, then rinse the diaper thoroughly in cold water. Hot water can set stains. For stubborn marks, use gall soap or a suitable stain-removal spray and rinse. A bidet sprayer can make this step easier.

3. Pre-rinse

Before the main wash, run one or two rinses or a short pre-wash, optionally with a small amount of detergent. This removes most urine and loose soil before the main cycle.

4. Choosing detergent and the main wash

Avoid fabric softener, soap nuts and products containing more than 5% soap, as they can leave deposits on microfibre, microfleece and Coolmax and reduce absorbency. Powder for whites is generally suitable because it contains oxygen-based bleaching agents. For PUL with a factory-applied water-repellent finish, choose a powder with less than 5% soap and about 5–15% oxygen bleach. Follow the manufacturer’s detergent dose for heavily soiled laundry and adjust it to local water hardness.

Use a cotton cycle at 60°C, or 40°C with an appropriate laundry sanitiser such as Nappy Fresh or Igienizzante Bucato, followed by an extra rinse. Do not overfill the washing machine; about two-thirds full allows good agitation. Sunlight can help fade remaining stains.

5. Preparing diapers, spinning and drying

Remove inserts from pockets, detach SIO inserts and secure hook-and-loop tabs before washing. Leave the waist snaps open so the inside is washed properly; rise snaps may remain fastened. Use the spin speed recommended on the label, usually 800–1000 rpm.

Avoid drying PUL directly on a hot radiator, in hard frost or at high heat, as extreme temperatures can damage the laminate. Drying outdoors is useful, but support diapers with elastics so their wet weight does not stretch them. Inserts, fitted diapers and only those AIO diapers approved by the manufacturer may be tumble-dried. To soften air-dried inserts, flex them by hand or rub them over a smooth table edge; citric-acid treatment should be used only where the manufacturer allows it.

With a simple routine, reusable-diaper laundry is organised and manageable—usually around three extra loads per week.