Lucy trying to swat an invisible (but audible) fly hearkens back to "Job Switching" (ILL S2;E1) in which Lucy Ricardo followed the fly with her eyes while her hands were in wet chocolate. When she went to swat the fly, she slapped the face of her co-worker with a hand covered in gooey chocolate.
This was the third episode filmed, but it was decided to air it fourth.
Curtis has potholders made that say "When your home repair problem is too hot to handle." Lucy says that she hasn't seen promotional potholders since Wendell Wilkie was running for president. Curtis says "I liked Wilkie."
Curtis says that people tell him that he resembles Mr. Whipple, a supermarket clerk who chided customers not to squeeze the Charmin in television and print ads. Gale Gordon (Curtis) and Dick Wilson who played Mr. Whipple did indeed have a similar look.
When Lucy's legs are like rubber after bouncing around in the malfunctioning lounger, Ball's husband Gary Morton's distinctive guffaw can be clearly heard from the studio audience.