Well, wouldn't she be surprised? Many days on this island had been spent elbow deep in grease to keep him busy, to pass the time, to avoid thinking about how awful it all was. Those early days of seclusion in the hangar with the speeder, among other smaller ships, avoiding conversations or confrontation.
He couldn't have a temper tantrum if he had no one to get angry with.
Kylo Ren took the half-assed invitation and leaped on up with one easy hoist, giving a tilt of his head to knock away the stray dark hair that had fallen in his gaze. "I have gotten my hands plenty dirty," he commented before kneeling beside her to assess the problem.