How do you get rid of smelly cocker spaniel ears?

For my cats, if they had waxy , smelly ears we cleaned them with kitchen roll. Then get some rosemary or lavender , put it in boiling water , let the water cool down and wash the ears with the water . It helped when we did it weekly or when they were getting smelly again . If there's alot of wax and it's kinda really dark in colour they may have an ear infection so if it carries on being bad , best thing to do is get it checked out.