I have a new to me 2019 ATAS that has a sticky mode switch on left side. When it sticks the up down button is inop. and I can not use mode switch. I can pull it up with my finger tips and all is good until I push it down again. Tried blowing it out with compressed air and then added some silicone spray... no help. Tried WD-40 spray... no change. I will try to pull it apart and see where issue is if I cant find anyone that has had to deal with this. Any help with this would be fanfriggintastic!