Sorry this guide wasn't more helpful for you.

maybe reddit will be more useful to you..

https://www.reddit.com/r/wiiu/comments/4...

You can try spraying some WD-40 on the screw. Just don't spray it everywhere.

There's no reason you can't but without the temp sensor you must be cautions if your battery does over heat because it can lead to damages on the touchscreen as well.