How can I get my cat to take a bath!?

My mom is telling me to give her a bath because she's starting to smell. I try to bathe her once a month but she won't sit still! I put in warm water and the soapy shampoo and I hold her in the tub, but she scratches and bites me until she wiggles away. I have even tried holding her down with gloves so the scratches and bites won't hurt but she still manages to get away. I've tried saying NO, smacking her backside, taking away her food and water, splashing water on her face, but nothing works, she won't stop wiggling and scratchhing!! I'm at the point where I had to lock her in the carrier and did her in the water for her last bath. What can I do??