How big are they? Them being 8 days old I’m guessing it’s only just grew it’s first true set of leaves. Give them about a shot glass amount of water.
The plant will let you know, but it should be fine. When it gets bigger it will drink more often in the cup.About that big but the soil is way dryer. I already ended up soaking the medium before reading your comment. I'll let it dry out again before watering. I turned up the humidity range from 60-70 to 65-75. My temperature range has been 82-72 since germination. I usually give them a shot glass but it's always dry the next day. Is it okay to watering once a day?
spray doesnt go deep enough in the container usually its better to just water properly and wait for the medium to get dry again.