Telling a teammate their effort is hurting the team will make your voice wobble. Say it once, kindly, then outwork them.

Saying the hard thing to someone on your own side is uncomfortable because you need the friendship to survive it. The wobble is not weakness, it is proof you care how it lands. The conversation works when you say it plainly once and then drop it, since repeating it turns honesty into nagging.

If someone’s half effort is costing the group, find them alone, name the specific thing, and keep it short. Then let it go and show up early to the next session. Being the example persuades more than being right.