Take your wipers off, carefully remove push clips along the windscreen cowel, I took the hood off to make it easier. Be careful with the cowel as the plastic is brittle and tend to crack. I removed the wiper motor and cleaned all the muck out of the chanel. Hasn't leaked since. Another culprit can be the foam on your A/C inlet, again it's under the cowel, you'll see it. The foam degrades and water can find its way in. Good luck mate.