The best odor control for marijuana depends on several factors, such as the amount and frequency of use, the type and quality of marijuana, the ventilation and size of the room, and the personal preference and sensitivity of the user. It may take some trial and error to find the most suitable and effective method for each situation. One of the most common methods is to use an air filter or a fan to circulate and purify the air in the room where the marijuana is stored or used. Air filters can remove particles and odors from the air, while fans can help disperse the smell and prevent it from accumulating. Some air filters are specially designed for cannabis odor control, such as carbon filters or ozone generators. Another method is to use odor-neutralizing products, such as sprays, candles, incense, or gel beads. These products can mask or eliminate the smell of marijuana by releasing a different fragrance or chemical compound into the air. However, some of these products may not be very effective or may have health risks if used excessively or improperly. A third method is to use natural remedies, such as baking-soda, vinegar, lemon, or coffee grounds. These substances can absorb or neutralize the odor of marijuana by changing the pH level or the chemical composition of the air. They can be placed in bowls, jars, or sachets around the room where the marijuana is stored or used.