Switch it on then use the hose with the floorhead (or attachments) to clean..
the hose from the vacuum cleaner and detach any floorheads or tools..Check for visible clogs at either end.
Then gently use a broom stick to.dislodge any clogs.(don’t use too much force.).
Rinse the hose with cold water.submerge the hose.
in a few inches of water with washing up liquid.. Re-rinse the hose.
thoroughly with cold water..Cut away any hair, string, or rug fibres that have caught around the brush.
Remove any larger objects that might stop the brush from turning.Check for any blockages at the inlet.
Clean away any grime or sticky substances from the brush.Once you’ve cleared any potential blockages, replace the brush roll and try to rotate it manually.