How to deal with wet dreams
The gemara tells us that if someone was lusting during the day, he is responsible for the wet dream while sleeping. Watching a movie with immodest images, besides being assur, will very often cause wet dreams. I am sorry if what i wrote is blunt, but fact is fact.
Any guy who comes to GYE and actually posts, is obviously serious about becoming clean; so you are obviously committed to doing the right thing. Do yourself a big favor now (do not push it off like many guys do). Decide that when Hashem instructed us V'lo sassuru acharei eineichem He was not instructing us to only not watch hard core pornography; He meant anything inappropriate. In addition, anyone here can tell you, that the worst thing a guy who is trying to break free can do, is watch a movie with a suggestive scene. Being that a big part of getting clean is rewiring our brains, watching a scene that objectifies women - which in essence dehumanizes those mothers, daughters, wives, etc. to the status of mens' toys of pleasure, sends the brain right back to it's former sick status.
However, very often, guys who are staying clean do experience wet dreams "out of the blue". this is expected and normal, due to the subconscious mind's "thirst" for this pleasure that one has BH stopped providing it with. If one is not lusting during the day, and doing what it takes to stay clean, and even so has a wet dream, he should not worry one bit. In fact he can congratulate himself that his subconscious has "realized" that he stopped these bad behaviors. The good news is that eventually, the wet dreams subside.
Wet dreams that come unprovoked (without lusting during the previous day) should be completely ignored. They are an expected subconscious experience due to past habits and will iyh eventually diminish. Just keep on moving forward and do not pay any attention to them. An unprovoked wet dream is a good sign. Your subconscious mind is getting the message that consciously you are not doing this stuff any more. Yes, it may be unpleasant, but the good news is that eventually they recede too as you rewire your brain.