Cats are not best inclined towards baths and a lot of damage can be inflicted by those claws. Bathing a cat can be very stressful to the cat and is best avoided unless you need to.
If you take a rag and wipe it over the kitten and then wipe it over your resident cat that may help as you are transferring scents. If you wet the kitten by bathing her then all you will do is heighten the smell, ever smelt a wet dog?
6 weeks in cat terms is nothing, it took two of my lads 18 months to sort it out and they are now the best of friends, patience!