Sheldon was relaxing in his spot reading Harry Potter and the Goblet of Fire. His most recent roommate had just moved out and once again Sheldon is going to have to clean and repaint the room. He hates cleaning and cooking. As he's reading he's thinking to himself, damn that would be easy, just call for a house elf and they come.

Sheldon without thinking, did exactly that. He called out for Dobby and nearly shit himself when Dobby appeared.

"Yes, Master Sheldon. What can I do for you?"

"Are you real? I was just reading about you in this book. This has to be a bazinga."

"I am real. I am here to serve."

"Can you clean my apartment for me. My last roommate tore it up."

"Be glad too." Dobby then cleans the apartment and repaints the room and it never looked better.

Dobby comes in the living room and says "Anything else master?"

"Not at this time. Thank you."

Dobby is twitching like crazy. Not used to being thanked for his services. He then leaves.

This goes on for next several years. Even after Leonard moves in. Leonard thinks it's just Sheldon being a germaphobe and has to clean clean clean. He doesn't know about Dobby's cooking and cleaning. This still goes on even after Penny moves in across the hall.

Few weeks later after Sheldon sees just how messy Penny is, he asks Dobby to clean her apartment. That night Penny wakes up and walks out to the kitchen to get something to eat and starts screaming, "SON OF A BITCH. SHELDON GET YOUR ASS IN HERE."

Sheldon and Leonard run in to find out what happened as Dobby starts ironing his ears because he's done wrong. Sheldon tells Dobby to stop that and he does.

"Sheldon why the fuck is Dobby from Harry Potter cleaning my apartment?"

"He's been my house elf for a years now. He loves it."

After this things get back to normal. Now that Penny and Leonard know about Dobby, there's no need for Sheldon to pretend he can cook and clean. It continues to be fine until Leonard finds out about Sheldon's dog Snuffles.