I don't know if your's is exactly set at that.
Amazon just has a lot of copies floating around and mine (orange colored) is set at 39%, which yes, sucks.
But I need to see at what point when the beeping turns off. Because maybe if you set it dry, it beeps and stops and then you can keep running it dry.
At the moment, I'm running bantam eggs and some other eggs going in to lockdown soon (to be moved to a smaller incubator) so I can't play with the settings but if I get a chance to soon, I'll try to update.
I do think I remember reading people suggesting filling the sensor area with glue (permanent) or taping a wet cotton ball against it. I had messed with it several times trying to puzzle out how to disconnect it without messing with my heat settings, so it felt fragile enough by that point that I didn't want to mess with it more.
There wasn't anything in the directions about dry hatching either, or turning off the beep :/
If it wasn't for the damn beeping at 39% I would say it's a pretty great design. But it is *very* loud and obnoxious and more than once, having been woken up from sleep for something so stupidly pointless as dropping a few percentage points of humidity, I have wanted to test it into the sun. I would definitely test it out beforehand and set it as far from where you normally relax or sleep.