First Time Growing, GSC Auto

As the title states first time growing, started with letting the seed soak for about 30 hours in distilled water, then did the paper towel method, the sprout has fallen on the 7th day, about halfway through the light cycle, the steam has a lot of white hair on it, the sprout has since been propped up. Everything seemed to be going alright. In earlier photos you can see the stem was at a decent thickness and since has seemed to thin. I spritz the soil at least once a day right now, pH levels have been consist at 6.3-6.5. I don't know if it is getting too little water or too much. Also I'm not sure if its stretching and if I need to lower the light again. The seed coat has cracked and been splitting open, but at a very slow rate. Some photos I've seen cotyledon leaves as early as day 3 or 4, so I'm not sure exactly what I am doing wrong.