Did I mess up my Q

Did my first "Q" cook tonight....didnt spray the grate but did brush my chicken with olive oil....still stuck pretty bad to the grate .... bought a brass brush for cleanup which was almost next to impossible and now my grate is like a tanish color?? did i somehow ruin my grate....sorry new to this

no. just brush what you can off and then treat it with some oil after heating the grates up next time. i used vegi oil first but now just use pam spray. the grates are actually supposed to be porcelain coverd anyway. if the chicken stuck then yer temp wasn't high enough and you didn't wait long enough. i get the grates purty hot and then turn when the chicken itself lets go off the grate.