I recently installed a new kitchen faucet and have had a slow hot water trickle ever since.* The cold works fine.* I removed the water line from the faucet and only got a trickle so it's not the faucet. I think the problem maybe at the shut off valve but have no idea how to go about fixing it.* A picture of what I'm working with is attached. Can you help an inexperienced "plumber"??