I too am having trouble believing that you have a problem of not being able to get rid of lucidity. Oneironaut had a really good insight into the contradictory nature of what you illustrated. Like he said, what you described is a problem of not knowing that you are dreaming. But if the problem actually does have to do with knowing you are dreaming but not being able to know when you are in the waking world, then try what Marvo said. Make your dreams seem very unreal. Try flying, making the walls melt, causing people to appear and blast off into space, etc. Then when you try that stuff when you are awake, you can easily see that you are not dreaming. Read about reality checks in the tutorials. Those will solve everything.