It rained hard for a couple of days and I noticed there are leaks on the corners of my headliner. I check my sunroof and it looks fine. I have a feeling that the drainage of the sunroof is clogged up. I just need to know how many holes there are that I need to clean and what is the easiest way to fix my problem?

Please let me know so that I can resolve this immediately.

Thanks in advance.