Wall paint is become discolored around CPAP machine

The dark green wall paint is turning white around the CPAP machine and seems to be growing. Now before I rip the outside wall apart, could this be due to the machine being there for some 14 years and just needs another coat of paint or do I have a more serious problem?

I personally have not heard of this before. Maybe someone else here can share an experience.

Is it actually the paint becoming discolored? Or could it possibly be mildew? Have you tried lightly scrubbing to see if the white comes off?

I never heard of that but you might be right about needing a new coat of paint.

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