Dirt Devil DD9006 Instruction Manual page 6

7. After taking out the filter bracket, clean the filter bracket in water,
and put it back after drying (7)
8. After taking out the dust bucket, clean the the top of the filter in the
water, and then put it back into the air after drying (8)
9. Please charge up the battery before using this vacuum cleaner for
the first time. The indicator flashes when charging, and remains on
after charging. (9)
Note: It shall be charged for 5 hours and fully discharged for the
first use, and the normal time of each charge shall not exceed 4.5
hours.
Note: If the vacuum is connected to both the power supply and the
charger, the vacuum will not work.
10. After use, lay the product flat on the shelf fixed by screws (10)