Value Village ／ Beauty
This answer is a draft. It stays unpublished until legal review and source verification are complete.
Many people wash their brushes but only deal with puffs and sponges "when they look dirty". In fact, a puff coated in layers of sebum and foundation is one of the tools most likely to cause skin problems. This article sets out how often to wash and replace them, and how to wash them with what you can find in any Japanese drugstore or 100-yen shop.
| Tool | How often to wash | When to replace | Notes |
|---|---|---|---|
| Powder puff | Once a week | 1–3 months, or when the pile goes flat | Using both sides in turn makes it last longer |
| Liquid foundation sponge (used dry) | Once a week, or whenever it looks dirty | 1–2 months | Replace if it shrinks or tears after washing |
| Sponge used damp | After every use | 1–3 months | Never leave it damp. Complete drying is essential |
| Cushion foundation puff | Once a week | About 1 month (many makers recommend this) | Sealed in the case with liquid soaked in, so it soils quickly |
| Brushes | Once every 2–4 weeks | When bristles shed or splay | See separate article |
[Verify] The British study is understood to be from Aston University (Bashir & Lambert, 2019, Journal of Applied Microbiology). Check the figures and year of publication against the original paper.
Sebum and microbes are invisible. A sponge that touches the skin and gets damp becomes unhygienic well before it looks it. Managing by frequency is the reliable way.
An unwashed puff is harder on the skin. Press-washed and dried out of the sun, a puff lasts several months. Replace it once it wears out.
Alcohol does not lift the layer of oils well, and it can damage the material. Washing with neutral detergent is the basic method.
Heat warps and degrades the sponge. It takes longer, but dry it in the shade.
Because it is sealed, it never dries, and microbes multiply easily. Replace the puff about once a month as a guide; keeping spare puffs on hand is convenient.
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https://doi.org/10.1111/jam.14479
https://www.jcia.org/user/public/knowledge/usage
https://www.kokusen.go.jp/
⚠️ Editorial note: the source URLs above were identified by search. Our working environment cannot reach go.jp domains, so the contents have not been checked against the text. Verify every source before publication and record who checked it and when.
What we share here are ideas and everyday practices passed down among people living in Japan, together with general information drawn from public sources. They are not official recommendations, and they are not professional instruction. Practices vary between households and regions.
This is general information. Results vary from person to person and depend on your own conditions and surroundings.
Please decide for yourself, using your own judgement, whether any of this suits your situation. We cannot accept responsibility for any damage, loss or injury arising from following this article.
Cosmetics are not medicines and are not meant to diagnose, heal or prevent any condition. If your skin reacts, stop using the product and see a dermatologist.
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