5
12. Will the cleaning efficacy of F9 drop when cleaning a complicated
environment？ ...................................................................................................................... 21
13. How to reduce the noise of F9 during cleaning？ ....................................... 22
14. Why does F9 make strange sounds during cleaning? ................................ 22
15. What should I do if the Dreame F9 is trapped during cleaning？ ......... 22
16. What should I do if the Dreame F9 gets stuck when trying to pass
through a narrow space? .................................................................................................. 23
17. What should I do if the side brush or main brush is entangled during
cleaning？ .............................................................................................................................. 23
18. What should I do if the F9 is entangled with the power cord of the dock
during cleaning？ ................................................................................................................ 23
19. Why does F9 reclean an area after being moved？ .................................... 23
20. Why does F9 fail to reposition itself？ ............................................................. 24
21. What is the max height of obstacles F9 can cross? ..................................... 24
22. Why does F9 fail to decelerate in face of obstacles？ ................................ 24
23. Why does F9 collide with the walls when vacuuming along the
edges？……………………………………………………………………………………….……………..25
24. How to deal with device errors of Dreame F9? ............................................. 25
25. Why does F9 fail to power on? ........................................................................... 25
26. Why does F9 fail to charge？ .............................................................................. 25
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