I had the same issue with my John Deere mower until I switched to an john deere lawn mower belt (oem-equivalent). It’s been holding up well under heavy use, and I haven’t had to replace it for a long time. The key is finding a belt with reinforced materials that can handle constant stress. OEM belts are good but expensive, and a high-quality equivalent can give you the same durability at a better price. If you’re having issues with stretching or snapping, it’s worth investing in a properly tested replacement.