I had one that was off that much, but it was only like $7. If you paid $30 bucks for it, I think I would take it back to see if they would exchange it....IMOPhoenixxx said:ok so i did the salt test and it read 65, i figured i did it wrong because it was 10 degrees below what it should be at, could a digital hygrometer that was 30 bucls be that much off, i put it in my humidor which has 65% humidty beads in it and the hygrmeter reads 55, , i basically just wanna know if any1 has seen that big of a misreading on a hygrometer