to go.
you need to essentially clean your shaver and its blades to a degree every time you use the device. that being said, some extra cleaning can of course be required from time to time. how often you do the cleaning and/or extra maintenance really depends as well on how often you use your beard trimmer.
one thing you can do for your beard trimmer is oil the blades. keeping them well oiled helps them stay working properly, especially if you use your trimmer on a regular basis. it also makes sense to do this if your have quite a lot of facial hair and are using the device for some 