I have low hot water pressure in the kitchen sink the cold pressure is fine and the rest of the house id fine

Sounds like a clogged hot water inlet port in the cartridge. How often do you flush your heater? Try this. Shut the water off and pull the cartridge, Check the inlet ports for trash and clean. Now place a pan over the open valve and turn the water back on for a minute to flush out the supply. You should have a strong stream when doing so. Reassemble and test. good luck, Tom

Thank you!!