Question: how to clean a ceiling exhaust fan
Option 0: Use the dusting attachment on the vacuum to clean inside the fan housing and around the motor. For hard to reach spots, use a toothbrush and a piece of paper    Reinstall the fan cover by press the clips on the fan cover together, and slip them over the slots in the fan housing.
Option 1: Use the dusting attachment on the vacuum to clean inside the fan housing and around the motor. For hard to reach spots, use a crevice tool on the vacuum.    Reinstall the fan cover by press the clips on the fan cover together, and slip them over the slots in the fan housing.
Answer: 1