Based on the context and the answer, generate a question. 

Context: He took out a screwdriver and gave one of the buttons at the back of the central remote a half - twist . He sprayed lubricant on the coils . And , oh yeah , replaced the wall unit 's shattered panel ( Now THAT I could prove was broken . ) .

Answer:

None of the above choices .



Why did he spray lubricant on the coils ?