Hi, the temp control down button and the fan down buttons keep sticking ( I think my son got sand inside the button?) If I pop them out with a credit card all works ok but soon as I use the control and push it in it sticks and stays pushed in (either causing the temp to go right down to air con or the fan to switch off) I then need to pop it out again with the cc. Is there a way I can remove the button front totally to check if it's sand that has got behind and that I can vacume out or does the whole dash have to come off?? I don't want to force the button out and break it. Any advice would be welcome before i spend a lot of money at a garage.