The reason the controllers get dusty and start drifting is because Nintendo used Graphite as conductor for the analog stick instead of copper. Graphite is great for electronics tbh, it’s almost the same thing. But turns out that graphite isn’t good with attrition (I know, go figure), meaning that using the analog creates dust inside your controller, that messes up the position sensor. It’s pure and simple design failure. The dust isn’t coming from outside, if anyone was wondering…