Spoke Too Soon

Well I was raving about this mascara that I'd gotten for Christmas and well it's not working out very well now. It's not that I don't like it, but I think I got a messed-up one. First it doesn't come out jet black like I thought it would. I asked the lady at the M.A.C counter why this was and she told me that it was because it was dirty since I was using it over eye-shadow. So I went home and I wiped it off with Kleenex and it made it worse. Not only is it still not darker it seems to have really dried out. I can barely get any on my lid when I press down. I don't want to give up on it because it was a gift and I'd feel bad but I also want it to work properly. I think I'm gonna have to go back to M.A.C with the mascara and show them the problem maybe I can exchange it for something else. I guess I'll have to wait and see.