This is a Quick Tip Video showing the location of your sunroof drains, and how to clean them out. There may be 2 or 4 drains,depending on your make / model, located at the corners of the sunroof. These drains can get clogged with dirt, which can allow water to run inside your car. It is really easy to clean these and to fix your problem without going to the mechanic.
Feel free to ask questions in the comment section below! Good Luck!