Even if you go green and just use vinegar and water and old rags to clean, the vinegar still costs you something and you may want to re-use and wash those rags (at your expense).

就算你坚持绿色环保注意，只用醋加上水和自己的老抹布去清洁，可醋还是你的东西，你依然需要还钱买醋和更换抹布。