The fix, then, is to add a piece of paper (or cardboard) that is 1mm tall. Add in dust and other bits of dirt that accumulate over time, and the problem gets worse. This creates a space between the metal prongs and the contact pads, which results in drift and erroneous inputs. It turns out that VK discovered that Joy-Con drift can be fixed by applying pressure to the outside of the Joy-Con, which suggested that the contact point between the thumb stick sensor was gradually becoming loose. VK has discovered a laughably simple solution, but one that required months of testing, investigating and trial error (skip to 5:55 for the fix).
Thankfully, a permanent solution to the dreaded Joy-Con drift might have been found by a YouTuber called “VK’s Channel”.