I was just thinking about this that as all probes have solar panels attached to them so why do they have to shut down at the last stage, So I googled and found that dust sticks to panels because of which they cannot function properly.
But suppose I put glass/any material covering around solar panels, Is this a more power-consuming task to clear the glass again so that again sunlight will pass inside panels? I know it kind of sounds stupid but I am not able to swallow that solar panels cannot function eternally for probes?
According to me at least they should function for 100 years :P