Hykker X Range Keyboard Key Repair: Tab Key Not Responding, Alternative Shortcuts & Solutions

Hello, I have problems with the hykker x range, the tab always worked reluctantly, but now it has stopped quite, the switch works and this green board gave water drops for it, all the keys started working (on Microsoft anti ghosting everything went crazy because there was water on it), that is probably something with this disc because it does not react to any switch, I tried with a needle there to enlarge this hole from what comes in contact with the disc but nothing helped

Added after 12 [minutes]:

If you can't do anything anymore, do you know any shortcuts to switch windows without taboo (alt + tab, windows + tab) or can you assign another button as tab? e.g. such a screenlock

Added after 6 [minutes]:

And if you can't do any window switching programs you know?

Hello. Use the alt + esc shortcut to switch applications. Alternatively, map the keys with free programs, e.g. sharpkeys or keytweak.

Ok, thanks for this mapping - I had no idea that something like that existed - I gave myself a tilde tab and it's git