You’re not alone. I’ve always had this problem since the day I got it and I kept trying thinking it was my problem. Eventually I wrote back to ask for a replacement but it was past the refund/replacement time. S’well sent me a replacement O-ring instead which to my surprise, my bottle never had one to begin with! The stuck lid problem was never solved though. I use my bottle mostly to hold hot water. It’s fine when you open the lid while the liquid is still piping hot. Once it cools down and the pressure changes, it’s a horrible experience. I keep a broad rubber band on my lid to help me out cos i’ve hurt my wrist several times because of S’well. It’s a great bottle…but it’s a horrible experience with the lid. I refuse to buy another one fearing i’ll get the same problem, and I’ve even asked for a trade in option. Why would i need 2 bottles? I don’t want to create more trash in the environment and wishing S’well would share the same value. Guess they don’t.