Your engine block contains condensation
Depending on where you are located (frequent rain or humidity) it is possible to have condensation just under the screen.
Disassemble the control panel of the engine block and dry it either in the open air or using a hairdryer to go faster.
If the problem is not resolved, you can replace the control panel card, by following this procedure:
In case your product is out of warranty (more than 2 years), fill out the form (available here),
If your product is still under warranty (less than 2 years), fill out the form (available here), with your purchase invoice and a photo of the problem attached.