Preparing the Workspace and Tools
Before diving into the actual cleaning process, it is essential to gather the necessary tools and set up a proper working environment to ensure the procedure goes smoothly without damaging the delicate components of the Joy Cons. You need a well-lit area where small parts will not easily get lost, and having a soft mat or a clean towel to work on is highly recommended to prevent scratches on the plastic shell. The primary tool required for opening the controllers is a precision screwdriver, specifically a size 00 Phillips head or a JIS screwdriver which fits the screws often found in Nintendo hardware. Additionally, you will need a set of plastic opening picks or a spudger to help separate the shell halves without marring the plastic clips.
For the cleaning agents, it is crucial to choose the right type of alcohol to avoid damaging the plastic finish. High-percentage isopropyl alcohol, ideally above 90 percent, is generally preferred for electronics because it evaporates quickly and does not leave moisture behind, but for the plastic shell specifically, you must be cautious. Using alcohol that is too strong or applying it too liberally can sometimes cause the plastic to haze or become cloudy, which is exactly what you want to avoid. Therefore, having 70 percent isopropyl alcohol on hand for the plastic parts might be safer, while reserving the higher concentration for the metal contacts and circuit boards if you decide to clean them. Other useful items include cotton swabs for tight spaces, a soft toothbrush for scrubbing away grime, and a microfiber cloth for wiping down surfaces. Compressed air is also beneficial for blowing out dust from the vents and the analog stick assemblies without making physical contact.
Disassembly and Detailed Cleaning Steps
Once the workspace is ready, the first step involves powering down the Nintendo Switch completely and detaching the Joy Cons to ensure no electrical current is flowing through the system during the cleaning process. You should then flip the Joy Con over to expose the back and locate the four screws securing the shell. It is important to keep track of these screws as they may be of different lengths, and mixing them up during reassembly could cause damage to the internal components. After removing the screws, you can gently insert a plastic opening pick into the seam between the front and back halves of the shell. By carefully sliding the pick around the edges, you can release the plastic clips holding the shell together. It is vital to be patient here to avoid snapping the clips, as plastic can become brittle over time.
After the shell is opened, you will likely see a ribbon cable connecting the battery or the motherboard to the other half of the controller. You must disconnect this carefully by flipping the small locking mechanism on the connector and sliding the ribbon cable out. With the internals exposed, you can begin the deep cleaning process. Start by using the compressed air to blow out any loose dust or debris from the circuit board and the button mechanisms. Next, take a cotton swab slightly dampened with isopropyl alcohol and clean around the buttons, the analog stick base, and the side rails. The side rails, which connect the Joy Con to the Switch console, often accumulate a lot of dust and grime, so using a toothpick wrapped in a bit of alcohol-soaked cotton can help remove the buildup from the corners.
For the plastic shell itself, dip the microfiber cloth in a small amount of the chosen alcohol solution and gently wipe down the entire surface. If there are stubborn sticky spots, you can use the soft toothbrush to lightly scrub the area, but be careful not to apply too much pressure. When cleaning the translucent plastic parts on the Neons or other colored models, use a lower concentration of alcohol and wipe quickly to prevent the hazing effect mentioned earlier. Ensure that no liquid seeps into the transparent light pipes or the sticker areas, as moisture can get trapped and cause discoloration or peeling.
Critical Technical Points and Precautions
A major aspect of deep cleaning Joy Cons involves understanding the chemistry of the materials you are working with. The plastic used in the shells, particularly on the limited edition or transparent models, can react negatively to strong solvents. While isopropyl alcohol is generally safe, using other household cleaners like window sprays, acetone, or bleach will almost certainly ruin the finish and cause the plastic to degrade or become opaque. You should strictly stick to alcohol-based cleaners and water for the external parts. Furthermore, when cleaning the electronic contacts on the back rail, it is permissible to use a higher concentration of alcohol to ensure a good electrical connection for the future, but you must allow the alcohol to evaporate completely before reassembling the unit.
Another critical point concerns the analog sticks, which are notorious for developing drift over time. While you have the controller open, it is a good opportunity to clean around the base of the analog stick. However, you must avoid spraying liquid directly into the stick mechanism. Instead, apply a tiny amount of alcohol to a cotton swab and clean the exterior of the stick housing. Introducing liquid inside the potentiometer can wash away the lubrication or cause corrosion, leading to premature failure. Additionally, when handling the battery, avoid puncturing it or bending the ribbon cable excessively, as damage to the battery can be a safety hazard. Always disconnect the battery connector before working on the board to prevent accidental short circuits.
Troubleshooting Common Issues
During the cleaning process, you might encounter issues such as buttons that feel sticky or unresponsive even after cleaning. This is often caused by residue that has hardened inside the button mechanism or on the rubber contact pads underneath. If pressing a button feels mushy, you may need to remove the button assembly entirely and clean the shaft of the button as well as the hole it sits in on the shell. Sometimes, debris can get lodged in the small springs that provide the tactile feedback for the buttons. Using a pair of tweezers to remove any visible hair or lint, followed by a light application of contact cleaner or alcohol, can usually restore the crisp feel of the buttons.
If you find that the Joy Con does not sync with the console after reassembly, the issue might be related to the rail connectors. Even if they look clean, a thin layer of oxidation can prevent proper electrical contact. In this case, using a pencil eraser to gently rub the metal contacts can remove the oxidation layer and improve connectivity. Ensure that the ribbon cables are seated correctly in their connectors and that the locking tabs are fully engaged. A common mistake is failing to lock the ribbon cable connector, which results in a partial connection that causes intermittent disconnections during gameplay.
Reassembly and Performance Evaluation
After all the components have been cleaned and dried thoroughly, you can begin the process of putting the Joy Con back together. Start by reconnecting the ribbon cable to the motherboard, ensuring it is aligned straight and then flipping the small locking bar down to secure it. Next, align the two halves of the shell, making sure that the buttons and the shoulder sliders (SR and SL) fit into their correct slots. It is often helpful to hold the shell together loosely and press the buttons to see if they move freely before snapping the case shut. Once you are confident everything is aligned, apply gentle pressure around the edges of the shell until you hear the clips click into place.
The final step is to screw the back plate back on. Remember to insert the screws in their original locations if they were of different lengths, though in many Joy Con models, they are the same size. Tighten them until they are snug, but be careful not to overtighten, as stripping the threads in the plastic is a common mistake. Once reassembled, attach the Joy Con to your Nintendo Switch console and power it on. You should test every button, including the minus and plus buttons, the home button, the capture button, and the screenshot click, as well as the analog sticks and the motion controls. This final evaluation ensures that the cleaning process was successful and that the controller is not only looking fresh but also functioning perfectly for your next gaming session.