Hello, the advice would be to sprinkle water directly on the (cotyledons) so the bark is as smooth as a plastic, you can remove it with your hand, carefully holding the stem and letting the soil dry more would be a good option until the seedling goes up and goes with drops of water without wiping, I have an amnesia from the Ministry of Cannabis that seemed not to want to come, I reduced the water quotas and it was resolved I hope I helped something!