Before bathing your Maltese, you need to brush him first. Because an unbrushed Maltese is almost inevitably a matted Maltese, and once you get a mat wet, it’s all over but the cutting. Besides, with a good brushing you have eliminated a bunch of dead hair that you now won’t have to bathe – very efficient, all the way around. Most Maltese dogs should be bathed every seven to ten days, but of course a lot depends on how much he goes outside and how carefully you brush him in between baths.