I have started 200 darjeeling to seed about a month ago. 3 days ago I had my first sprout and today another however the first one turned brown and died. What did I do wrong. I have them in the 72 count seed planters with a cover ( mini seed greenhouse) . I have used miracle grow seed mix and they are also under a heat mat. The soil might be a bit too moist would that cause a fungus problem that killed it? Can I take the cover off for a bit and let the soil dry out?? I am really new at this and am looking for a bit of help. Also do they need to have a bit of indirect light?? thanks