Spilled tea on my HP Envy x360 - 15 - ed0159ng and some keys on the keyboard stopped working

[NotebookNässer9]

Hello. I accidentally spilled tea over my laptop of the above model and now some keys on the keyboard don't work. Among other things, all numbers up to five and the space bar. I wanted to clean the inside of the keyboard with isopropanol alcohol, but I can't get any further than removing the back cover because I can't find any instructions on how to remove and reinstall the keyboard. Hopefully someone can help me.

[Huffer]

Here is the Service Manual:

Manual 

The keyboard is embedded in the top cover. You will not find instructions in the manual for replacing the keyboard because that is not how it works. You have to disassemble the whole laptop, even the motherboard and what is left over is the top cover/backside of the keyboard. You can theoretically remove the keyboard from the top cover but it involves dealing with some rivets and very hard to get it back in right.