The best way to take care of your violin bow and the hair is to wipe the rosin off it after every time you play. You can do this with a soft cloth or a microfiber. You want a material that can remove any fresh dust while also polishing the surface of the stick. If you notice clumps of rosin then you can usually comb these out using an old toothbrush. Cleaning the hair may seem like a suitable alternative to rehairing the whole thing but this can be incredibly tricky. You will want to remove all of the hair beforehand so the wood doesn’t get wet. The best thing to do in this case is to send it to a professional to be cleaned.