Humidity alert when thresold is lower than % notification

Hello,
I’m currently trying to configure an automation to send me a notification if the humidity is below 80%.

If I trigger the automation manually - it works and I receive the notification.
Unfortunately, it won’t trigger automagically :frowning:

The code I used is as following:
alias: Cigars below 80%

alias: Cigars below 80%
description: ""
triggers:
  - trigger: numeric_state
    entity_id:
      - sensor.temp_cigars_humidity
    for:
      hours: 0
      minutes: 0
      seconds: 30
    below: 80
conditions: []
actions:
  - metadata: {}
    data:
      message: Below 80% add water
      title: Cigars Humidor
    action: notify.mobile_app_iphone
mode: single

What is a current value of the sensor?
Is it numerical?
Note that the trigger works ONCE when the value becomes less than 80 (until it rise higher than 80).