Sometimes the stroller does not automatically unfold easily if the seat is attached. If the seat is not attached, and the stroller is still not automatically unfolding properly, there is probably something wrong with the internal spring. have you had the stroller long? Quinny says that the spring will last "virtually forever", but we all know that there are always lemons. If you have not had the stroller for a very long time, contact quinny and ask for a replacement. They have been pretty good about getting them out to clients.
If you have any further questions, feel free to contact me anytime: [email protected]