Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Would rate negative stars if available

You reset the combo by twisting the end. While locking or unlocking your bike, the you can accidentally twist the end and unintentionally change the combo. That is what happened to mine. I used it a few times, then once when trying to remove it from my bike, the combo I set stopped working. I have no idea what the new combo is. I'll have to cut the lock off my bike.Buy a different lock.