There are a few ways to fix Joy-Con drift on your Nintendo Switch, including updating your controllers and calibrating the sticks.
How to Fix Joy-Con Drift at Home
What is Nintendo Switch Joy-Con drift and how to fix it?
How to Fix Joy-Con Drift - Nintendo Switch Guide - IGN
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How to fix joystick drifting on a Nintendo Switch
How to Fix Joy-Con Drift Without Disassembly - iFixit Repair Guide
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How to Fix Joy-Con Drift with No Tools - TeeChu
Joy-Con - Wikipedia
Nintendo Switch: 5 ways to fix Joy-Con drift -- with or without tools - CNET
How to fix Joy-Con drift on your Nintendo Switch - Reviewed