I had a leak in the kitche two handle compression faucet. I removed the valve stem and replaced the washer. When I turned the water back on I had no pressure so I back flushed the lines and the pressure was some what restored but not all the way. The pressure in the sprayer is great but the pressure coming from the faucet spout is poor. I think there is sediment stuck in the fuacet spout. How do I remove that. I checked the aerater and it is fine