If you’re going to go to the trouble, you might as well use a flea shampoo or something like that, just to keep her clean. Something that helps with my cat, don’t throw her in the tub full of water. Maybe stick her in there, play with her a little, give her a treat, and then stealthily fill up the tub. If it’s not a shock, it might make it go smoother. Or it might not. Have fun, either way!