https://hal.inria.fr/hal-01196853Martin, KimballKimballMartinDepartment of Mathematics [Norman] - OU - University of OklahomaShankar, KrishnanKrishnanShankarDepartment of Mathematics [Norman] - OU - University of OklahomaHow often should you clean your room?HAL CCSD2015search with cleanupcombinatorial optimizationcoupon collectorâ€™s problemsequential occupancyStirling numbers of the second kind[INFO.INFO-DM] Computer Science [cs]/Discrete Mathematics [cs.DM]Episciences Iam, Coordination2015-09-10 15:17:142017-10-30 14:06:022015-09-11 13:33:29enJournal articleshttps://hal.inria.fr/hal-01196853/document10.46298/dmtcs.2109application/pdf1We introduce and study a combinatorial optimization problem motivated by the question in the title. In the simple case where you use all objects in your room equally often, we investigate asymptotics of the optimal time to clean up in terms of the number of objects in your room. In particular, we prove a logarithmic upper bound, solve an approximate version of this problem, and conjecture a precise logarithmic asymptotic.