Shrivelling and drying sounds like you may not have caught the superthrive OD in time. Practice your germination technique on some crap bagseeds until you figure out what combination of water/nutes/mineral supplements/media you can safely use... IMVHO, for going into hydro directly from seed, RapidRooters are MUCH more forgiving. Stick the sprouted seed in, and virtually ignore it for a few days, just making sure it doesn't dry out- no pre-soaking or other fussing required.