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 - Nintendo Switch Guide - IGN
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How to Fix Joy-Con Drift - Nintendo Switch Guide - IGN
Serious Drift: Using Nintendo's Joy-Con Repair Service – VIDEO GAME BOOK CLUB
Nintendo Switch: 5 ways to fix Joy-Con drift -- with or without tools - CNET
Joy-Con drift: Nintendo repairs controllers outside the warranty period - Galaxus
Nintendo Switch: 5 ways to fix Joy-Con drift -- with or without tools - CNET
How to fix Nintendo Joy-Con drift
How to Fix Joy-Con Drift on Your Nintendo Switch: A Troubleshooting Guide