A common problem with washing machines is blocked outlet by greasiness or fibers. A red light will flash with 'drainage'. With intensive use the filters of the machine must be cleaned at least once a month. Also see the user manual.
What do you need? A wash basin or towel, cleaning acid and sodium carbonate.
For men: Wash separately: white laundry, colored laundry, dark laundry.
For women: Put items like bras and other delicate items in a special laundry bag. This prevents wires or small finishings from coming lose and get stuck in the working parts of the washing machine.
Nowadays detergents are concentrated. Regular washing can be done at 30 degrees and bathroom textiles at 40 degrees. This saves half the amount of energy compared to washing at 60 degrees.