There are just two occasions when cleaning workers should be hired. The first occasion is when there is an excessive amount of work to be done and not enough staff. The second occasion is when the amount of work is substantial, but the number of employees is limited. There is a good probability that you will have a greater amount of work to do if the number of people working for you is decreasing because of factors such as retirements, long-term illnesses, or resignations. This has the potential to start a vicious cycle.