Question: Clean your bathroom exhaust fan
Options:
Turn off your exhaust fan. Use a can of spray paint to clean the fan grill and force the dust to be be painted onto the fan surface.
Turn on your exhaust fan. Use a can of compressed air to clean the fan grill and force the dust up into the exhaust pipe.
Answer: Turn on your exhaust fan. Use a can of compressed air to clean the fan grill and force the dust up into the exhaust pipe.