He takes the time to thoroughly explain the instructions.
Take the oil and spray it right in there which will help lubricate the door.
However, the best way is to remove the door.

Image by Andy Barkin via YouTube
Continue to watchAndy Barkin tutorialon YouTube for full instructions and details.
Add the door back and lubricate the latch mechanism as well, and it should be good to go.
There are no special products needed for this cleaning tip which is the best.

