The youngster went into that room and she immediately saw the phone propped up on a cabinet.
It was facing the centre of the room so that she would be filmed if she got changed and she saw a red flashing light.
The worried youngster put a sock over it, got changed and then removed the sock, before using the hot tub.
The failed clip, which was recovered from the phone s recycling bin, showed the defendant coming back into the room a few minutes later and ending the recording.
Later he suggested the child use the bathroom to have a shower but she was suspicious.