Repairman Achievement in Your Toy

Story-related and cannot be missed.

After finishing up the underwater event per the "FVC" achievement solution, you'll be back in the bathroom where you started. Next to the three sinks on the left side is the hand dryer. In the beginning of the game you'll have partially repaired it to progress to the wall breaking sequence. You'll need to combine the plug with the wire, and then that with the duct tape, and then use that on the hand dryer, as well as put the outlet cover on the outlet below the dryer. Later in the game, after the underwater event, go back to the hand dryer and use the plug in your inventory on the dryer to fully repair it and unlock the achievement.