I have run into a problem with the water pressure on my kitchen sink. It started with losing pressure and a day later it was only dripping out. It's a single handle kitchen faucet and I have already checked the screen. There was a little bit of build up but not enough to block the water flow. Do you have any ideas of what it could be?

You have already checked the ovious -- filter screen and the next possible

Bottle neck is the faucet... It is unlikely that a water line is a problem...

There may be blockage in the faucet, turn off water to both lines and remove the

Lines, try to suck the blockage out of the lines under the sink going to the faucet

With a wet/dry vac with the faucet in the on position... If this clears the blockage

You may not need to remove it... You may need to repair or replace faucet...

Much better to remove the faucet cartridge. Then a quick blast cracking open the stop with a rag over the faucet clears everything out.