What I do and never have any issues. I run a flood and drain table 15 min flood every 3 hours in a 2x2x4tent , clone in rock wool -rock wool in lava rocks in 4 inch pots. Cheap led/purple light mounted at top of the tent. No cover, no dome, no spraying, no fans. The flooding creates enough humidity and the light makes enough heat. 100% success rate everytime.