Yes, you can make a DIY cleaner for a washing machine. All you need to do is add 2 cups of baking soda to your empty washing machine and run a long, hot washing cycle. Once the cycle has finished, add 2 cups of white vinegar and about 10 drops of an essential oil like lavender to the detergent tray of your washing machine. Again, set it to a long, hot washing cycle. Once the cycle has finished wipe over the inside drum using a cotton cloth with a little white vinegar on it.