yes, after 3 days i completely remove the dome. i do this so they will be forced to make new roots to get their water. if i leave the dome on the humdity stays to high and they just take up water thru their leaves never needing to grow roots. this is also why i let my plugs dry out every few days. it will force them to grow new roots to seek out more water. not completely dry, but pretty close. i wet them fully then let them dry until jut the tops are dry, then wet them fully again. leaving maybe 1/8" inch of water in the bottom of the second tray.