Write the next sentence in the following story.

How to get rid of drain flies
Identify the problem areas.
Examine all the drains in your home and any area inside or outside the home that has standing water. Any area with multiple drain flies is likely a problem.
Luckily, drain flies do not stray far from the place they have chosen to make their home, so it is rare for a drain fly infestation to spread to all areas of the house. This is especially true if you catch the problem early.