You can’t directly teach them but maybe you could do an agreement chore list/chart with each person being in pairs and doing a rotating schedule. The times you are cleaning with them you can gentle redirect or even say “so and so taught me this and I think it makes this easier”. It’s not your job to parent them or teach them so in the agreement have everyone sign a clause that they agree to pay part/full damage price at the of the lease in case their non cleaning leads to neglect of the property