My parents told me they rented a furnished house back in the 30’s when they were first married. It had bed bugs so they took the mattress and springs outside and set fire to them. My dad always was a kind of a practical take-charge kind of guy!
Your Dad was definitely a smart guy... he figured out “heat” killed them in the 30’s!! What is weird to me is for so many years, I thought they were just something of “ancient” times. “Night, night, don’t let the bedbugs bite” was just a silly, children’s poem. Not anymore!
I’m guessing the fire killed the bugs, but weren’t the springs a bit lumpy to sleep on afterward?