Washing pumping parts and bottles

Hello mummies, do you wash and sterilize all the pumping parts and the bottles after very pump? I heard what some mummies do is after pumping they put everything in the zip lock bag/ container and keep it in the fridge, and only wash and sterilize end of the day. Is that okay to do so? And how do you dry the milk bottles after sterilize if the sterilizer doesn’t have the drying function? Can I use tissue or kitchen towel?