Hello all, I have two Roccat KONE XTD Opticals and both have had the exact same failure, the left mouse wheel tilt. I have...

Hmm the site seems to have eaten my previous answer so I will try again. The KONE XTD uses OMRON micro switches for the primary mouse clicks. You need to desolder the old one and replace it. Fixing the switch itself is folly. Just grab some new switches for next to nothing and replace it.

If I'm understanding your issue correctly glue isn't the answer. You can grab those switches all over the place and you will need to desolder the old one and replace with a new. It's pretty easy if you have a steady hand and a soldering iron. If you do a search for OMRON micro switch that is what the KONE XTD uses for the primary click switches.