Hi Steven thanks for sharing on the forum!
It seems the wiper bar has got caught in the top position, it should be fairly simple to fix.
Firstly can you unplug or turn the power off to your Joto.
If you grasp both ends of the horizontal bar you should be able to manually lower the bar back down. There is a little black switch on the left side which activates the wiper. This will provide a little bit of resistance at first as the horizontal bar passes over it but this is normal – you should see the wiper bar rotate and press onto the surface as it passes over – You can see the action in the video below.
Once you’ve cleared the black switch the wiper can be deactivated by raising the horizontal bar back up by 10mm or so.
Once the horizontal bar is free you can plug Joto back in. Try entering and exiting care mode to ensure it’s moving correctly and let us know how you get on.