Tire pressure for best cornering performance?

[motoadve]

I had the tires too low when bought the car , it was 28 psi, I didnt know , I used the car like this for a month, handling was actually good, I drifted the rear a bit when pushing it , but it felt quite good, but my tires were wearing out quick.

So now I put 30psi on the front and 36 in the rear (as recommended by the door sticker ) and dont like the handling at all, I lost the confidence to drive it agressively on the twisties.

Whats the best tire pressure to have the best cornering performance?
Boxster Base 2005, 18' Pilot Sport PS2's tires.

I drive in the wet and in the dry, same pressure for wet driving than dry?