Grohe LadyLux Cafe mdl #

Question

Grohe LadyLux Cafe mdl # 33 758 single handle; w/pull out spray head -Hot & cold flow from faucet is minimal; at near by bar sink (same hot/cold feed) flow is fine. Suggests to me an obstruction in the cartridge/valve assembly. How do I take it apart and clean or clear the obstruction??r/fmb