Blanco Classic Single Handle Faucet with Pull-Out Spray .... "low water cutoff work" Questions

...low cold water flow and better hot water flow. Checked the supply valves and all are working OK. What's wrong? Already checked the shut offs for flow and it's good sounds like there may be some ...

water hose from the cutoff valve (turn it off 1st!). If the pressure there is good then try removing and cleaning the cartridge by soaking it overnight in white vinegar or consider replacing the whole