Lint identity kit

When sharing a home, there is often heated discussion about who should take vacuuming / sweeping responsibility. I propose a small machine with test strips that perform a dna fingerprint on samples of lint placed in them. Corresponding reference samples belonging to the housemates are placed in seperate receptacles.

The readout will determine what fraction each housemate has contributed to house lint through dandruff / skin flakes / shedding and thus to what degree each must participate in cleanup. It would also provide incentive to maintain scrupulous hygiene, thus lowering ones proportional contribution.

An add-on feature would be a readout displaying what percentage of lint was contributed by humans not in the reference standards. If this number is high, it might be necessary to add a reference - eg for one housemates very mangy girlfiend. One could then make a case that she should do her share of the vacuuming as well.