I don't know if this is good or bad but I kind of quit caring about being made years ago.
I get made by little old ladies at church twice a month when they hug my gun.
I get made wearing just a T shirt over my OWB rig on a windy day.
Most of the time when somebody I know figures it out I just give them a wink and that is it. People know I'm not an butthole and a wink is usually all it takes.
On the occasion when someone I don't know makes me or if I'm OCing I usually make a joke about it. One of my normal lines is "It's OK, I'm with the Government and I'm here to help.". People almost always chuckle and drive on.
If you carry you are going to get made sometIme. You may not know it as they may not respond out loud but you will still get made.
What witty answer you have doesn't really matter. Do not slink or run away like you did something wrong. Acting guilty of something doesn't do any of us any good. You did nothing wrong so act like nothing is wrong.