The possible scenarios are many. Perhaps you are trying to brush your teeth, but quickly discover that the drain is moving far too slowly. Maybe you jump in the shower and quickly wind up standing in a puddle. When these situations arise, your drain probably has a clog.
It is highly advisable to conduct a proper cleaning of your drains no less than every couple of months. Accumulations of dirt, soap, hair and grime can create serious clogs that cause no end of trouble. Utilize the advice that follows as a way to stop drains from getting clogged in the first place or resolving those clogs if they occur.