It’s possible to think that just because your water cooler is brand new, it is clean and hygienic. However, that isn’t always the case. It is not impossible to discover bacterial growth and other unhygienic problems in a newly bought water cooler. That’s why it is strongly recommended you wash and properly sanitize your water cooler before you use it for the first time. Not only that, but you also have to be cleaning it regularly to keep it sanitized and prevent the chances of bacteria building up.