I've heard of that too but I don't think it's the ideal trick. I think hygrometers react rather instantly so in 10 minutes it will say it's super wet, 95%! I don't think that necessarily indicates that it functions properly over the long haul, as in steady state readings in a given environment.
That's why I believe in a calibration that's somewhat scientifically accurate, ie, 75% salt and water solution in small enclosed environment. And keeping it there for at least 24 hours because that allows it time to adjust and function properly or bug out. Either way, it gives a better idea of what you're actually trying to use it for.
I've heard of that too but I don't think it's the ideal trick. I think hygrometers react rather instantly so in 10 minutes it will say it's super wet, 95%! I don't think that necessarily indicates that it functions properly over the long haul, as in steady state readings in a given environment.
That's why I believe in a calibration that's somewhat scientifically accurate, ie, 75% salt and water solution in small enclosed environment. And keeping it there for at least 24 hours because that allows it time to adjust and function properly or bug out. Either way, it gives a better idea of what you're actually trying to use it for.