A bad response can be corrected more usefully than it can be replayed.

Everyone snaps at some point, and afterwards the mind wants to run the scene again with better lines. That rehearsal changes nothing and quietly makes the shame heavier, which is exactly what stops people going back and repairing it. A correction takes about ninety seconds and lands in the real world: I was sharp with you earlier, I am sorry, here is what I meant. The other person has been waiting for that rather than for your remorse.

Pick the exchange still playing in your head and go to that person today. Say the plain version, and then let it be finished.