well, there's cleaning and there's cleaning.
with much prodding, i can get my wife to clean a gun on the rare instances she actually practices with one. but then i end up cleaning it again anyway, because my standards for gun cleaning are much higher. so that's the downside.
on the upside, she does the vast majority of all other household cleaning (dishes, laundry, sweeping, dirty diapers, etc, etc, etc). and i think it's safe to say that her standards are much higher than mine in those areas. so i'd say that my occasional cleaning of a gun for her is more than made up by what she does for the household.
i say pick your battles carefully. i also think it's worth cleaning their guns to get them into shooting. it might save their life one day.