Ah I think I can see where I'm going wrong here, I'm wearing the same top and shorts for 2-3 days of commuting.
Also I don't think my washing liquid and 30 degree washing is cleaning the smell out of the clothes (Persil non-bio small and mighty).
I can't try a different liquid as my skin is very fussy (I have problems with eczema).
I don't think my washing regime is getting all the ground in dirt, oils and bacteria out of the clothes.
(also I think getting boiled in the bag on winter commutes when wore my jacket didn't help).
I'm going to try a hot wash at 60 on one of my tops to see if that banishes the smell without damaging the fabric.
(the tops are Foska Coolmax polyester). Then I'll take advantage of the sunny weather and leave out all day in the sun tomorrow.
If that doesn't give me any joy, I'll try sodium bicarbonate or vinegar in the wash, this might dissolve the oils/kill bacteria
(silly question, but if vinegar's acidic, wouldn't it react with the bicarb?)
and if the above doesn't work I'll try the meths option.