Airing instead of washing
Short answer: A night on a hanger by an open window removes most everyday smells. It saves a wash and extends the life of the garment.
Why it works
The smell from a single day of wear sits in the moisture in the fabric, not in the fibres. When the moisture evaporates, the smell goes with it. That needs moving air, not soap.
How to do it
Hang the garment on a hanger well clear of other clothes and air the room overnight. Do not fold it into a pile. See bamboo t-shirts for men.
When it is not enough
With heavy sweating, cooking smells, smoke and anything worn directly against the skin for a long time. Underwear and socks always need washing. See bamboo underwear for men and bamboo clothing for women.
Frequently asked questions
Can you air clothes in a freezer
No. Cold halts bacteria but does not remove smell.
How many times can you wear a t-shirt
One to two days indoors. After that it needs washing.
Does a spell on the balcony help
Yes, if there is no rain or exhaust. An hour of fresh air does a lot.