3. Ceiling fans
Because of the spiral motion, they spin in, ceiling fans tend to attract most dust than some things in your house. Your ceiling fans should be cleaned once every two to three months.
To keep it clean, use a microfiber cloth with dish soap. Gently rinse out the dirt first. Then use the soap to get rid of the external dirt. Make sure you rinse the cloth after cleaning each of the blades. Repeat the process throughout the blades. Rinse, air-dry then reinstall.