What exactly tool I need to open the MBA

Hi everybody,

I spill coffee on my MBA. Everything is running well. I see a tech that explain that the motherboard is not touched. They don't clean up the laptop. So i need to change the uppercase and the keyboard.

I would like to open the laptop. I would like to clean up the keyboard and the uppercase because therre are sticky. But i would like to know what kind of tool i need exactly?

On this tutorial, they say that i need 9 mm 5-point Pentalobe and 2.6 mm 5-point Pentalobe.

See: MacBook Air 13インチ Mid 2011 上部ケースの交換

My question are

Do the pentalobe screwdriver open the booth size?

See: P5 Pentalobe Screwdriver Retina MacBook Pro and Air

Do i can put the keyboard in the hot water and dry it?

Thank you very much