I think subconscious resistance to lucid dreaming partly builds up as a response to boredom and frustration. Are you running out of ideas of what to do in LD's? Getting bored with your ideas? Getting frustrated every time you don't have one? I think these things decrease my chances of having LD's, while excitement about things to do in them, confidence, and not having a recent induction failure make it easier.

Boredom and frustration, I think, block LDs because dreams work on a principle of "if you expect it, odds are you get it." If you expect failure, you get failure. If you expect scary things to happen, they usually do. If you expect to bonk a hot celebrity, the opportunity will more likely than not pop up.

Maybe try a new technique, listing your new dream signs, and coming up with something fun and within or just barely beyond your normal lucid talents to do in your LD.