Bottom numbers changing

Hello, our Airthings device is changing numbers on the bottom when you lift it up. Is that normal? It changes from 119 to 228. I know it’s high. The top is at 10. I noticed it goes up when the ground is wet. Right now, snow is melting and the pump in the basement is running on and off. I opened the windows and it didn’t make much difference. Hopefully it will go back down soon. Do you have the same experience? I really don’t like that it’s high. We already installed an exhaust on pump well in the basement.