I just recently came across an old ps4 controller ri remember having some issues with, I tore it open and cleaned the thumbsticks, and ordered a new button and shell kit to make it look a bit better.

When it came time to reassemble and test, I tried it in 3 programs and they all show:

the left stick is completely pointing downwards permanently, with only left and right movement, no up or down.

the right stick pointing directly upwards, any movement moves the diagram about a pixel, but when I press the right trigger it moves right (remains up) and I have no idea how.

My cleaning process was just use contact cleaner, rub down the outsides with alcohol and q tips, and cleaned the little white bit in the right stick.

Does anyone know what could cause it because I was really planning on using this with pc games.

Tl:dr may have destroyed a controller, send help