The key for "P" letter stopped working on the keyboard. After removing the key and cleaning the keyboard the key still did not wok. Therefore I decided to change the whole keyboard.
Purchased keyboard from ifixit and followed the online guide to replace the keyboard. The procedure was relatively easy thanks to the friendly and very visual instructions. Now the keyboard is as new.
It was more easy for me to use the plastic opening tools than spudger to lift the connectors and detach the tapes or plastic sheet.