How Clean Is Your Beer System? As a retailer, you may or may not clean your own draught lines,but you have a invested interest in making sure the cleaning is done properly. Clean lines make for quality draught beer that looks good, tastes great and pours without waste. Take the time to ask your service tech about his/her experience with working with beer systems & cleaning your beer line cleanings—no matter who they are—to ensure that your system receives the service it needs to serve you and your customers well. Simple checks like using a straw to scrape the inside of a faucet and checking keg couplers for visible build-up will help to ensure your beer lines are being properly maintained and serviced.