Locked my Sony Vaio Duo keyboard

I am really hoping someone can help, as I have now been without a keyboard for several days.

I made the mistake of cleaning my keyboard yesterday whilst my laptop was on. I must have pressed something which has disabled my keyboard. Can someone help me get it back on?

My laptop is a Sony Vaio Duo 13 (SVD 13 22C5E). It doesn't have a removable battery or a reset button. I do not have a USB keyboard I can try. I am running Windows 10 Home 64 bit. The keyboard was working fine for weeks following the update, so it isn't that. I also don't think I have installed any software which could be causing the issue.

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  In device manager, keyboard is "working properly" and I have tried to check for driver updates.
  
  Using the assist button to access the BIOS, the keyboard didnt work here, which is worrying.
  
  I have tried disabling sticky keys in the Ease of Access settings.
  
  I have tried uninstalling the keyboard from the Device Manager. Both the 'HID keyboard device' and the 'PC/AT Enhanced PS/2 Keyboard (101/102-key). Both automatically reinstalled upon reboot.
  
  I have tried holding down the shift key and holding down both the L and R shift keys simultaneously.

None of the keys work. This includes the caps lock indicator light and function keys. I hear no sound upon pressing any keys. Annoyingly, I don't have a restore point set up.

Can someone help me to identify if I busted my keyboard during cleaning (which I would struggle to believe, as it was just a damp cloth) or to help me 'unlock' it. My gut instinct is that I pressed a combination of keys when cleaning that has triggered a setting or locked the keyboard.

Thank you