Bissell PowerForce Helix Quick Start Manual page 3

Check the entire length of the hose for any holes, cracks, or damage and
replace if needed.
Next, run a broomstick through it to remove any clogs or obstructions.
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 Is the lower hose clogged?
If:
To check:
BISSELL Confidential
Then:
Unplug the vacuum and remove the screw on the lower back of
the machine holding the lower hose in place.