Q: Throttle response is dull now

I have suspected for a while that something was up with the throttle in my 2008 Ford Escape. The car began to feel funny when I let off the gas, like the engine was responding late to me letting off the gas. Luckily it wasn’t in any kind of bad situation. The car has 90,000 miles on, I expect some quirks. But yesterday I ran a stop sign by accident and finally checked it out. Turns out it was the gas pedal sticking! How can I fix this? It seems so troublesome for such a small piece, I just want to use my vehicle without crashing!