Headphone icon still showing after disconnecting from mainboard

Hi all!

I have a rare problem.

I have a Galaxy S4 (i9505) wich had a little bit water damage. After the damage i opened it up and cleaned up some corrosion with isopropanol. After i reassembled the phone it works fine except the part that the headphonejack seems to be connected.

When i disconnect the headphonejack it keeps telling me that it's connected.

I even tried a new HP connector, with still the same problem.

Did i miss a part of the mainboard to clean? The connector on the MB is clean, even tough a connector seems to be a little bit black tough..

I hope someone has a solution or seen the same problem..

Tnx!