It is also a common misconception that saunas are good for moisturizing the skin. The moist feeling the skin experiences after a sauna is temporary. The hot air in a sauna expands blood vessels, making the skin even drier. Also, Even the skin's oil that prevents moisture evaporation melts away, causing a loss of moisture and reduced elasticity. About 5 minutes for a wet sauna and 3 minutes for a dry sauna is appropriate.
I shouldn't go to the sauna anymore.
They say you should avoid hot weather as much as possible to prevent skin aging.