What is the most logical next event?

How to seal a door
Tighten the hinges on your door.
Some drafts can be caused by loose hinges, so before you seal the edges of your door, you should take a few minutes to tighten any hardware.
Lift the door by the doorknob.
If you can move it upward, the the hinges are probably loose. Use a screwdriver to tighten the screws holding the hinges in place.