problem with trip computer

Hi! I have problem with buttons from trip computer or trip computer itself. Sometimes I can't change options in trip computer, like from milate to message etc. Where to look for a fault?
 
Has the button become stiff or changed how it did work?

Ive found that mine isn't as sensitive as it was, I'm putting it down to the weather and seen as everything's plastic it's probably not fittin tidy with it all having shrunk? Lol

Through the winter my car rattles and things move a little easier, like the window controls in the door, they wiggle around a little easier and in the summer I don't get any rattles and everything seems a tighter fit.
 
When it's working it working nice, buttons aren't stuck or something. Also I think that auto wipers not working when I can't change trip computer mode... Seems like it's freezing?