When should I put hair oil in my hair, and what specific factors should I consider to optimize the benefits of this practice? Is it advisable to apply hair oil daily, or should it be relegated to a less frequent regimen? Could environmental conditions, such as humidity and temperature, dictate the frequency of application? Moreover, how does my hair type—be it straight, wavy, curly, or coily—affect the ideal timing and method of application? Should I incorporate hair oil into my pre-wash routine for maximum penetration, or would it be more beneficial as a post-wash leave-in treatment? Additionally, what role do the particular ingredients in the oil play in determining the optimal timing? How can understanding the unique needs of my hair contribute to a more effective hair care regimen? Is there a general guideline regarding the time of day that is most advantageous for the application of hair oil, or does personal lifestyle outweigh such recommendations?