I'm starting to experience the same, throttle lag. Something is dirty and needs to be cleaned or changed! I was thinking myself it was probably the fuel filter since I'm running close to 40k miles. Prolly give the fuel injector cleaner a whirl too.

 

what kind of spray should you use to clean it?

 

Autoparts stores should carry some Throttle body cleaner and some sensor safe spray. Some throttle body cleaners are sensor safe.