How exactly do you go about it, and what equipment is needed?
I bought a set from Petsmart it had toothpaste a finger toothbrush and a regular toothbrush. The first few times I put the toothpaste on my finger and let them lick it off. Then after a while I put the finger brush on and put some toothpaste on it. They both really seemed to like the texture of it and they would knaw on it a little, so while they were doing that I'd move my finger back and forth across their teeth. Then after a few weeks of that I brought out the toothbrush, I always just put it in front of their face first then wait for them to try to eat the toothpaste, once they put it in their mouth I hold them and start brushing. Corkscrew is very good about this, I brush his teeth while he is on the cat tree and all I have to do is lift his lips a little to brush the teeth. Tibby is more squirmish so I put her in my lap to do it.