I typically flush my lines with extremely hot water directly after use, then I dip into a solution of PBW, rinse in StarSan and store wet. Then, I soak again for a very short time in StarSan directly before use.
The easiest and most economical way I?ve found to keep small parts clean and sanitized is to use a 5 gallon bucket of the pre-mixed solution(s) in my brewery at all times ready to use. Then I change the solutions about once every two months. I have found the PBW tends to erode the bucket material, so it needs to be replenished sooner. But, I have never had any infection issues since I?ve practiced this method.