At the beginning of the week, I noticed I had overdone the humidity, leading to green spots, possibly moss or algae, appearing on the perlite. I decided to reduce the humidity to 50% and sprayed the affected areas with a solution of 5% hydrogen peroxide mixed 1 to 10 with water. I then allowed the soil to dry out more than usual. The green spots have disappeared, and everything seems to be back to normal. I'll continue monitoring the situation and have increased the air humidity to 60%.