tbh illegal tint is prolly the #1 thing you'll get pulled over for here. I have several friends in HPD and they all agree dark tint is one of the first reasons they'll pull a car over. I've had way too many problems with one of my previous cars (also with 20%) in the past getting pulled over for exactly this... so my friendly advice would be to just have it removed and redone. They can ticket you $287 per window in your car that is in violation so it can be a very expensive lesson to learn the hard way.
Life has gotten much easier for me since I've complied with reconstruction laws with this car.