People stink. Terrestrial, Martian – it’s just a fact of life. Put 500 of us in a tin can, push us into space and institute an exercise regime, you’ve got odor issues.

Now add to that the preference for exercising in the higher gravity sections of the ship (i.e. the outermost sections, i.e. OUR level), and to THAT add a broken recycler, and you’ve got a crisis.
I understand that the early Martian colony had similiar issues (Martian Sociology 101 – hety I paid attention sometimes!). Before there was an ‘outside’, everyone huddled, and huddling humans smell.
Might be a good time to eat in your quarters. Just sayin’