What's the best way to get a clearer sound on the trumpet?

i havent played for a week and now i lost my sound; i cant open my teeth more without making a sound; help! %26gt;:(What's the best way to get a clearer sound on the trumpet?
Visualize projecting your sound a few feet in front of your trumpet. Picture that you are breathing with a warm and open air that carries ahead of tour trumpet. It wont happen right away though, it only takes a few days to loose some touch to the trumpet and it will take a few days to bring it back.What's the best way to get a clearer sound on the trumpet?
I agree with the person above me. Opening your teeth more after a certain point will weaken the sound. Just put more air through it. More pressure, more sound.
my band director tells our trumpets to ';blow through the horn';