Oh ok so leave the gauge on OUT Nd get the temp to around 70/75f with a 70/75% rh?!?
You are making this so much harder than it needs to be stop worrying about temps and rh it is pretty much irrelevant at this point if it’s live able for you the seeds can start no problem.
I have never seen someone worry so much about how to pop a seed
Stop worrying and stop using plugs for seed they are for cloning, if your temps were that high there is a chance they will never pop. Get rid of the heat mat. Get a seed starter mix from any store, prewet it water it good and then let it sit a day. Soak your seeds in a shot glass of water nothing else is necessary let them soak until they sink (watch them carefully if they sink for to long they will die off this step is unnecessary but to each their own) Then lay them in the center of a seed cell and sprinkle a little dirt on top spray with a water bottle ( don’t water them in just cover with a 1/4 in of soil and spray it down). Place seed tray in a warm corner without light for 12 hours then turn the light on and walk the hell away from it don’t come back to it for another 12 hours you will have seedlings trust me don’t even use a dome. Domes are for clones since they don’t have roots. YOU DO NOT NEED A DOME FOR SEEDLINGS. If you do this you will get seedlings.
Trust me do it like I said and your good