Well that just it, it is a problem with your technique. Release agent or smoking a mold is a temporary easy fix to an issue that mite take some time and trial and error to fix, most everyone is looking for the quick and easy instead of the right way which ends up being easier in the end.
Ya when I first started out I smoked a mold or two and tried a release agent or two but the fine folks on this forum showed me the error of my ways. A couple of my molds just required a good cleaning to get them to drop bullets and a couple molds required quite a bit of work to get the bullets to come out well. In the end I can pick up anyone of my molds, consult my casting notes for the mold, lube the spur plate and pivot points and drop perfect bullets from the first cast. Good thing about what I learned is I can pick up any mold, start casting and within a drop or two have a good idea what the mold needs to take care of any issue that might show up which makes getting a new mold up to speed even quicker. One thing I don't miss is having to deal with mold release when I'm working on a 1000 bullet casting session.