Min, try prune juice, or eat fruits like papaya, banana, or oats. I on my aircon throughout during the whole mth of confinement. If u are super strict type, I guess answer is shouldn't use aircon or fan. In fact, some even keep their windows closed. But I think is madness lor. During confinement we sweat like mad, and feel v hot. And if u bf, is super unhygienic man. If u on aircon even normal days, I doubt u can tahan without it during confinement.