Father Spec re-enters the room to inspect the chest. He doesn't want to touch the clear substance, but the possibility that it is functioning as a seal keeping gas or something in has occurred to him. [[passive perception/inspection both 20]]
If he believes he can proceed without uncovering an obvious hole, he will use his dagger (first) to try to lever the substance away. He's also proficient in thieves' tools, if he feels there is a lock that can be picked. But perhaps if someone else (more agile than the middle-aged Spec) is also proficient and wishes to try, he can offer help [[advantage]]. Or, if there's a volunteer, he'll take the help from that person.
He whispers a quiet prayer to himself before proceeding [[casting guidance, +1d4]].