Shared chores only stick when the work is visible, the rules are simple, and the follow-through is reviewable.
Make the rule explicit
A shared chore should not depend on guessing. Clarify who owns it, when it appears, and what counts as done.
Keep recurring chores recurring
If shared chores vanish between cleanups, people stop trusting the system.
Use review instead of repeated arguments
A quick weekly review of overdue chores and repeated misses is better than re-litigating the same issue daily.