It is best to inspect an exterior door in a sunny or well-lit area.
It is important to understand this, because a door that sticks in the summer may not stick in the winter. In this case, you would try a less drastic solution, such as lightly sanding the door, or else it may be drafty and shrunken come winter.
If you are worried about the lubricant possibly staining the door, you can take the additional step of removing the door from the frame. You can find out how to remove a door from the hinges here.
WD-40 would also have the same helpful effect on your door, but it is messier and dries out faster. [7] X Research source
Hinge screws are known to strip out, so you may have to add a longer screw or plug the hole and then re-screw it. [10] X Expert Source Gino ColucciHome Improvement Specialist Expert Interview. 7 January 2021.
If that didn’t work, the hinges might be bent. Remove the hinge pin and use a wrench to slightly bend the hinge knuckles back so when you reinsert the pin, it pulls the door back just enough to open easily. [12] X Expert Source Gino ColucciHome Improvement Specialist Expert Interview. 7 January 2021.
If you’re an amateur or only have a little wood to remove from your door, you may want to try using a palm sander to do this instead.
