Keeping your drains running smoothly and not stopping up.  You most likely notice when a drain is getting slow, your tub/shower is ankle deep by the end of a use.  Your brushing your teeth or shaving and the water isn’t going down as rapidly.  These are signs the drain is becoming partially blocked.  Often you may act by pouring chemicals into the drain  like draino.  Before you do this because it is not good for your pipes and can also leave you with an awful odor.  Try just simply filling your sink and letting it drain.  You can also assist this with a force cup or sink plunger.  These methods work as good or better and cost and consequences are nil.