Ask iFixit: Does Blowing Into Gaming Cartridges Actually Fix Them?
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Ask iFixit: Does Blowing Into Gaming Cartridges Actually Fix Them?

Short Answer: No

As someone born right at the tail end of the cartridge era, when I think of video games, I think less of the blocky gray cartridges and more of disks and downloads. Still, the very first console I ever owned was arguably Nintendo’s last cartridge-based handheld. And you never forget your first console.

A Persistent Habit

My Game Boy Advance might be a relic from 2001, but it still runs games flawlessly (until it’s dark outside). There’s a certain charm in the tactile feedback of inserting a game cartridge—the satisfying click and the nostalgic sound that follows when the Game Boy logo flashes on screen.

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Game Boy Advance Cartridge

Repair information for the game cartridge used for Gameboy Advance games, also known as the AGB-002.

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I’ve broken a Nintendo DS, but this Game Boy Advance still plays games like it’s the early 00s. That didn’t stop me from performing a ritual borrowed from generations of gamers before me: Sometimes, I gave the cartridge a quick blow before trying to start the console. Don’t get me wrong, it’s not like I remember the games failing to load often, but I still did the thing.

Those were the days before I was using the internet, so I’m not even sure where I picked it up and why I was so sure that it worked. But did blowing into cartridges ever work?

The short answer is no. As has been pointed out in the many many debunkings of this popular gaming repair urban myth, it was mainly confirmation bias. Often, there was nothing wrong with either the console or the cartridge; the issue was with the connection between them. Removing and reinserting the cartridge was the true fix, giving the impression that blowing on it was the magic step. So it’s all down to the particularities of game cartridges.

The Insides of a Game Cartridge

If your game progress won’t save anymore, you can probably fix it by replacing the battery inside the cartridge—here, a battery from inside a Pokemon GBA game. The process requires a little soldering (it’s easy, we promise!).

Nowadays, you get your game as files stored on (flash) storage or a disc, but game cartridges were far more than just storage. They contain printed circuit boards populated with chips, SRAM, other surface-mount components, and (sometimes) even a battery for progress saving. That essentially made them hot-swappable extension cards for the console. This also meant that not all games were created equal.

Some cartridge games used enhanced chips for better performance and others even added their own special features for gameplay. That’s especially true for the Game Boy era which saw a whole laundry list of special cases, like Kojima’s Boktai series which included a solar sensor, the infrared panel on the cartridge of Robopon or Drill Dozer’s rumble pack.

The crucial interface that allows a game cartridge to function involves a row of metal contacts located along the cartridge’s edge. These must be aligned precisely with matching pins inside the console’s cartridge slot. If these contacts are misaligned, dirty, or corroded, the game bugs out or fails to launch.

The practice of blowing into game cartridges started with the Nintendo Entertainment System, which used a more error-prone system than the Famicom, which it was based on, to align the contacts of the cartridge and the console.

Inside an NES cartridge: A lot of empty space, and a row of corrosion-prone contacts.

The new system, called “Zero Insertion Force,” made it easier to insert and remove a cartridge—but it also meant the cartridge’s contacts weren’t being scrubbed by friction with every insertion/removal. So the cartridges were more prone to build-up of grime and corrosion.

To make matters worse, in the NES, Nintendo also added the first-ever game console technological protection measure, a lockout system called 10NES. 10NES used a key in the game to open a lock in the console, to determine whether a cartridge was authentic and coded for the correct region. Modern versions of this same system, by the way, are the reason that game consoles have been largely left out of Right to Repair laws.

When 10NES registered a bad cartridge, it would blink the power LED and enter an endless reset loop. Gamers of yore discovered that removing and reinserting the cartridge—and blowing on it—could make the contacts align more consistently. Why blowing? Maybe to dislodge dust, maybe just because gamers have been blowing on their dice for good luck for eons.

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Nintendo Entertainment System

A game console released in North America by the Nintendo Company in 1985, called the Nintendo Entertainment System, model NES-001.

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Cleaning It The Right Way

While blowing might displace some dust, it won’t solve issues with corroded or dirty contacts—and might even make things worse by adding moisture, which can lead to more corrosion. Nintendo, to their credit, did their part to point that out.

Four years after the launch of the NES, they released an official NES Cleaning Kit which included cleaning accessories for both the cartridge and the slot. Additionally, Nintendo’s troubleshooting website for the NES Game Pak was updated to explicitly state that you should “not blow into your Game Paks or systems” sometime around the mid 2000s. A similar warning was also printed on the backside of Nintendo 64 cartridges.

So, what’s the best way to tackle dirty or corroded contacts? We’ve got a precision cleaning kit with a bunch of tools to make it easy. For the cleaning fluid, you’ll want to use 90%+ isopropyl alcohol or specialized contact cleaner. Any time you’re cleaning electronics, it’s important to use isopropyl in concentrations of at least 90%, as anything less has enough water that it could cause more corrosion before it evaporates.

Cleaning corroded contacts will require opening up the console or cartridge, but don’t worry—chances are there’s an iFixit guide that can walk you through the process, be it for your cartridge or console.

The next time you’re tempted to blow into a cartridge, remember that knowledge and proper cleaning techniques are your best tools.