How much wear did u put on them in a day? The easiest reply would be just to not say that you wore them....but in my experience, the main thing that they check for aside from big obvious scuffs on the sides of the shoe is the soles. I remember once that i had a pair of shoes that after i bought, i realized they didnt fit right, but i was in a rush one day, so i just tried to walk on mostly grass and stuff like that....and sure enough, when i returned them, that was the only thing they checked. So make sure they look as decent as possible, and try to take em back.