From KnightFury:
10 - Mrs. Hudson wants 221B spotless for Christmas. How can she get Holmes to co-operate?
"Mr. Holmes."
Holmes' knife hit the red target painted on the newsprint exactly. "Yes, Mrs. Hudson?" He sang out. "A client?"
"No. I wish to speak with you."
"Proceed."
"I cannot help but notice that the flat has been—untidy since the Doctor moved out."
"I rather prefer it in this state."
"I'm afraid I do not," she said firmly. "Your lease details that you must maintain basic cleanliness. I'm your landlady, not your housekeeper."
"You are having a visitor you wish to impress for Christmas."
She blushed. "Yes, Mr. Holmes. Please keep the rooms tidy for me."
"I make no promises, my dear woman."
"Very well," she sighed. "I knew you couldn't anyway. I just thought I would appeal to you."
"I can. I just do not wish to."
"If you say so, Mr. Holmes."
The reverse psychology worked quite nicely after all.