I’m new to pressure canning and have a glass top stove. I’m having a really hard time regulating pounds of pressure and am wondering if the pressure goes over what it should if that’s okay? For instance, I’m pressure canning beans now and they need to process for 90 min at 11 pounds pressure. I cannot keep it at 11 and it tends to rise between 11-14. Is that okay as long as it doesn’t fall below 11 pounds? Thank you!