Razer Deathadder Elite RZ01-0201 partial left click registers.. need fix

this is pretty old mouse. i checked for driver updates in control panel. right click is working but left click it works only in few areas or if i click with more pressure. hardware issue, i tried in laptop and it still showed the same. Haven't cleaned at all and i tried dissasembling to clean but the area between the left click and base i didnt know how to remove (i was able to remove screws and see the scroll wheel and stuff). Couldnt find any software in the razer website first thread btw