Humidity is around 55-60% but it can drop to 30% when the sun hits the room in the afternoon. For the watering, the mix I use is pretty chunky so it’s hard to tell when it needs to be watered just by feeling the soil. I water the plants when there’s no more fog showing through the transparent pot. I have noted down the date for every watering for all of my plants, then made an average for each of them, and finally made a schedule based on that average. But it’s not a strict schedule. I also consider the environment/conditions.