[nnain]

Sunlight isn't an overkill. It's a great germ killer (You have to be cautious not to leave them out for too long, lest the UV/Heat damages the colours).

You can use a lot of detergent to remove the last bacteria; but household detergents are a big source of water pollution.

[amelius]

Or you could throw your clothes into a geyser [1] :)

> (...) The group put their soiled clothes in a pillowcase and threw it into the geyser’s cone. When it erupted, the clothes were sent flying over a hundred feet into the air. When they collected them, the churning, heated water had indeed cleaned them.

[1] https://news.ycombinator.com/item?id=14146482

[_0w8t]

Hm, I thought the best way to kill germs is to wash clothes at 60C/140F or higher.

[riffraff]

it is a good way, but it's also a good way to ruin some more delicate clothing.