<span class="link_user">@phlstvns</span>, awesome by all means give it go, i did it on mine for about a week and then took them off to let them to get blown about a bit by the fan so they didnt get too damp. also give the inside of the cup a little mist. Good luck on your grow :seedling::green_heart::fist:
<span class="link_user">@phlstvns</span>, to bring up the relative humidity and temp during the early stages as seedlings to help them grow better. Though in reality the domes are only clear 18oz cup with a few holes in ( i macguyvered it as its better for my budget).