[Reminder] When the parents to replace the dust bag, check the vacuum cleaner inlet and outlet filters need to be replaced, the vacuum cleaner into the air filter is mainly to protect the motor to prevent dust from entering the motor room; outlet filter to prevent secondary pollution indoors. Change the vacuum cleaner filter can effectively extend the life of the motor! Experts suggest that every 1 to 3 months to change the filter. Specific to see if the filter black hair stains, black hair stains need to be replaced.