Sad leafs

I'm spraying the surface every time it's get dry

looks like overwatering, how often and how much do you water?

7-10 cm may be a tad to close for your light I would say at this point maybe as well. They don’t need a ton of light at this point. I use a much bigger light at this point(190w LED) but it’s like 45cm above at least. I’m not Sure what that 45w bulb will produce for brightness but I imagine it’s all coming from a smaller, condescend spot. You put that spot 7-10cm above your seedling and it may be a bit to much for her at this point as well. Just a thought. Cheers 💨

Humidity at 70% is a tad high at this point I think maybe. I like it in the 50% range at this stage in the game. Could be your issue here. Cheers 💨