I'm quite new to Puzzling Stack Exchange but am slowly starting to make more difficult questions. I'm thinking of giving hints but obviously we shouldn't give too many hints too fast. So is there a rule of thumb or a guideline for the amount of hints and the time in between hints so the question stays difficult but also interesting?
No hints would create a situation of the NOC+10 riddles, though for this particular riddle it seems after a few weeks there is still somewhat of an interest though not much..
So what would be the best thing to do considering unsolved puzzles and hints?
EDIT: To clarify, all the puzzles I make are solvable without the hints (at least that's the way I intended them to be). The hints should (normally) not be needed to solve the puzzle, but when it proves to be too difficult (something I did not foresee), when should I post hints to help people? So perhaps the question is more: when do I know the puzzle is TOO difficult and needs additional information (hints)? I hope this clarifies it a bit more.