If your rat problem gets worse after you try to get rid of them yourself, it could mean that your plan didn't work or that there are more rats than you thought. DIY ways to get rid of rats. Also, using methods that don't work can make the rats run away, which makes the infestation harder to deal with. To stop the problem from getting worse, it is important to hire a professional pest control company to help find and get rid of the pests.