Let the pot dry out and then water until you get run off. With your pot you need to be patient. It can be a little tricky. You are looking for run off from the bottom. Shove your moisture meter sideways into one of the lower holes to check. Lift it up when it's newly watered and dry to get use to knowing how much water is left.
You shouldn't be watering to top it up.
You shouldn't be watering to top it up.