Replacing a broken Joy-Con strap is simple and affordable. First, remove the damaged strap: press the small release button on the strap (near the Joy-Con connector) and slide it out of the slot on the Joy-Con’s side. Ensure you buy the correct replacement strap—'L' straps for the left Joy-Con and 'R' straps for the right, as they’re not interchangeable. Align the new strap’s connector with the Joy-Con slot, making sure the 'L' or 'R' marking matches the controller. Push the strap firmly until you hear a click, confirming it’s securely attached. Adjust the wrist loop by sliding the plastic slider to fit your hand snugly, preventing the Joy-Con from slipping during gameplay. Official Nintendo straps are durable and cost around $10 per pair, while third-party straps are available in fun colors and designs for customization.