Keep settling to a minimum. This procedure will help control damping off, but alone without proper room temperature. Dampen the seed, then apply dry powder fungicide. Coat to the point of good coverage. THE SEED - moisten the pot and medium.
Initial moisture is essential to the seed, therefore moisten well the first time.
From then on let the moisture decrease, not to show through the peat pot after watering. Suggest you use a plastic plant flat without holes. Jugs of warm water may be the most economical way to add heat. Remember to water individual pots and keep proper moisture. Most ideal being 85 degrees.