[header] How to get rid of drain flies [title] Identify the problem areas. [step] 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. 
[substeps] 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.