Very little pressure kitchen sink, hose works fine? We have little sea pressure with the kitchen faucet itself, checked the...

We have little sea pressure with the kitchen faucet itself, checked the aerator and it is dutiful. The spray hose is working great. Lines are all undo. I don't understand how the hose can hold full pressure while the spout doesn't?
Answers:    Check the valve for trash.
And the peak inside the nozzle isn't clogged? wonder if there's a screen further down into the faucet i.e. clogged? Wonder if the valve inside, the tape, has shifted or become clogged. If the eyeshade inside the aerator isn't clogged and the holes of the aerator aren't clogged........have you tried running the hose without the aerator? Is the flow reduced? Then I'd be looking posterior at the valve. work your style back from the finish.