GBA SP buttons do not work

[SOLVED]

Hello, guys I'm new here!
I changed the housing of my gba sp it was working normally during the process rubbed a cotton swab with isopropyl alcohol, and since then I have problems when playing, the A and B button must be pressed with enough force to register the command
I have already put a new rubber pad and did not work!
Could isopropyl alcohol damage the contacts?

 

As I recall the tact buttons used are raised metal circles which when depressed make contact with the metal below to complete the circuit. It is possible you might have a little of the liquid inside the buttons, causing the contacts not to close (ie acting as an insulator). Not saying it is, but might be possible. If there is a gap in the buttons, might be worth inserting a pin to elevate the button a little to allow a little airflow, so the alcohol can evaporate?

 

^ Thats can be true!
i've noticed a oxidation below the contact membrane,now,i must figure out a way to access there...
EDIT:
Now i firgure out how get rid of this problem
all I had to do was remove the metal circle, and use isopropyl alcohol to clean the contact below it!
above that circle, there is an adhesive, you only need to take a little of it, so leave a part of the exposed metal, and using a screwdriver detach it from the board

Thank Bacteria!
I hope it is useful to all forum!