Natural methods for eliminating odours:

White Wine Vinegar: White wine vinegar, a powerful natural ingredient, not only removes bad odours but also cleans the washing machine deep. Just pour a half glass of vinegar into the laundry pot and start a 30-C washing cycle without a load.
Lemon: Lemon, in addition to neutralizing odors, helps to remove the limestone from the washing machine. Add half a cup of lemon juice to the detergent dispenser and unladen wash at 30oC.

Rice and Essential Oil of Lavender: Rice, especially its water, is effective in removing bad odors and softening tissues. By adding a few drops of lavender essential oil, you will get optimal results. Apply this method similar to lemon or vinegar.