Bathroom vents are great for ensuring the excess moisture is whisked out of the room rather than staying in the bathroom to form mold. But most people don’t even think about the fact that bathroom fan vents do need to be cleaned too, as they can become breeding grounds for all kinds of nasties, not to mention a build up of dust.
You should definitely regularly clean bathroom vents so mold and dust buildup doesn’t force more mold and dust throughout the house. You can easily clean the vent with a q-tip and rubbing alcohol or bathroom cleaner. This will also help the ventilation since the air will be able to flow much easier.
If your fan has a removable cover, you can remove the cover and wash it thoroughly with antibacterial soap and hot water. Be sure to allow it to dry before reinstalling it back into the bathroom.