Question: "What do I do if I find water leaking inside my car?"
Answer: What most people do is assume they left a window open a crack. Then they leave it to see what happens, maybe it will fix it's self or dry up when the heater's on.
If you do have a leak, it is essential to deal with it right away before it causes other problems such as mould or condensation disrupting the electrical systems. We have an article about what to do if your car has a water leak on our blog.