Clean your kegerator after every keg. Trust me – do it! You don’t want to ruin the pure, fresh taste of a quality beer. Actually – you don’t even want to ruin the taste of a cheap beer because, if you don’t clean out your kegerator every time you replace the keg, you risk build up of bacteria, yeast or all sorts of nasty germs. Bugs and flies can crawl in as well and I’m sure you don’t like the taste of insects with beer.