I just got back from a pretty long hiatus of trying to lucid dream–the few I’ve had over the past week or so have been noticably “cloudy” though–is it just practice or something else that should cure this?
IMO, you can’t generalize from so few experiences. For instance, I had two weeks in which I’ve only had very short LD’s, and I was dispaired, asking for a cure to this problem. But it suddenly disappeared ! 
Thus, your cloudy LD’s are perhaps not related to the hiatus, and will probably stop soon.