Larry,
As you know most basement doors need a little bump to open and close. That is where the term Beaver knees came from because bumping the doors with your knee is so common. However, a little Silicone spray will usually help them open easier, but if the door continues to need more than a little bump, it is usually an adjustment problem. Adjustments can include everything from shimming the latch plate to relocating it by drilling new mounting holes. A word of caution though if you relocate the latch to make opening easier, if they are too easy, they have a tendency to open while you are driving and that is bad.
Gerald