Yes, your trigger set should be maintained as well.
Just make it part of your heavy cleaning routine. You know when you bust out the toothbrush and clean out the buffer tube, oiling / white grease the buffer spring etc..every other range session or so, your mileage may vary pending how you shoot.
Run and gun cleaning routine, just make sure no big pieces of brass, sand etc is in the trigger housing. a can of compressed air is great for range sessions. Slight shimmer, not runny oil; or light grease.
Look for wear, metal shavings that aren't brass and check your springs.
"When you have to shoot...Shoot; don't talk." Tuco
"God-damn right: never get outta the boat, unless you're going all the way" Cpt. Willard