Saint,
I agree with the advice from JonaLX. In addition to this, next time you go flying tell your skipper your concern and ask him to look at the brake pressure gauge during your subsequent landing roll. This is the most accurate way of telling when someone is applying more pressure to one toe-brake than the other.
You may find that you're applying an equal amount of pressure to both toe-brakes and the difference could simply be a matter of older brakes on one side compared to the other.