Removing the plugs lowers humidity. At lockdown you want it higher. I run mine with one hole plugged and no water added during incubation. The humidity in mine stays around 40 percent. I use a hatcher for lockdown. I did use the LG once to hatch and it worked fine.
I just lit a cigand held it above the hole that is over the fan and it drew the smoke in and then I put by the other hole and air was coming out of the one. It probably doesn't make any difference either way. If there is a LOT of air blowing out, and you think it making it hard to regulate temps and humidity then partially close the holes. I lay a quarter halfway over the hole to reduce airflow sometimes.![]()
Based on your cig

thanks so much for taking the time to advise
