You really want to uv treat your cold washed clothes, though (hang them outside). It kills bacteria about as well as bleach - see this subthread and story:
Well, we live in a world that's bombarded with UV, so there could be some drawback to living in an environment artificially shielded from it. Both may be nonsterile, but that doesn't imply they are the same.
https://news.ycombinator.com/item?id=17069083
In particular (the now moved) :
http://www.dranniesexperiments.com/sunlight-testing