In order to keep your cheap washing machines clean, one of the things that you need to do is to run a cycle of hot water with lemon juice or white vinegar. By doing so, you are able to loosen up all the grime that has built up over the years. If the smell of the vinegar is too strong for you, you can then run a cycle of water with about two teaspoons of baking powder. This would help take away the smell of the vinegar. Dont forget to wipe your tub dry. Any moisture that gets left behind can start anew your washing machine smell problem. If you do not have the time to dry it, leave the door open to air dry it. This is especially applicable if your have a frontloading washing machine.