Do you have a receipt that states the tint is 35%? Because your windows have a natural tint to them so even if you asked for 35%, it may show on the meter as 30% or some other number.
SO essentially you would need to get 40%(random number for arguments sake) to acheive a 35% light transmission to the meter.
You could also ask the station to show you how they determined the tint was too dark.
Like stated, you are already on the system and most shops wont want to turn the blind eye for ya now.....not that they do that anyway.
EDIT: Jack beat me to it