Sarcasm

I have a son, 13 yrs old, who has some behavioral issues. Within the last year, and especially the last few months, he has used sarcasm in most of his communication with family. He has no reason to say mean, disrespectful, undermining things but he does it all in the name of joking and in 90% of all his interactions. It’s exhausting to listen to him day in and day out. I’ve tried giving his jobs for each offense or tally marks and at the end of the day that is how many laps around the neighborhood he has to walk. I cannot keep up on all of it and jobs or negative consequences don’t seem to nip it in the bud. I need your expertise on getting this type of behavior to stop. It’s such a negative vibe all day.