Did Blowing Into Nintendo Cartridge Help?

Like many of us, when Chris Higgins was young, he blew into his Nintendo
game cartridge to make it work. But did blowing really help?
Now a grown man, Chris looked into the subject matter and consulted with
several experts to find the real truth:

Higgins: “How did this lore about blowing into
the cartridges spread across the US?”

Viturello: “It was very much a hive-mind kind
of thing, something that all kids did, and many still do on modern cartridge
based systems. Prior to the NES I don’t recall people blowing
into Atari or any other cartridge-based hardware that predated the NES
(though that likely spoke to the general reliability of that hardware
versus the dreaded front-loading Nintendo 72 Pin connectors). I suppose
it has a lot to do with the placebo effect. US NES hardware required,
on most games, optimal connection across up to 72 pins as well as communication
with a security lock-out chip. The theory that ‘dust’ could
be a legitimate inhibitor and that ‘blowing it out’ was
the solution, still sounds silly to me when I say it out loud.“

Read the rest over at mental_floss: Link