How do I get my client to shower, when she refuses to take one? She even refuses to sponge bath.

Mom hates to get her hair wet. That is her biggest argument each and every shower time. So I have to say over and over that if her hair gets wet I'll just blow dry it. If it were up to her she would never shower or wash her hair. It helps to focus on how good a warm shower will feel, and how fresh she'll feel afterwards. I promise her a slice of pie after the shower. Anything to deflect her arguments. Sometimes I remind her that the shower will keep her skin from getting itchy, sores, fungus, or odor. I insist on at least one shower a week. I make the bathroom really warm and use several towels so she wont get chilled. I have a shower chair for safety. A handheld shower head is very helpful as it keeps spray out of her face and helps rinse those hard to reach places. I hope you find something that works.

Fear of falling is a huge factor. Are their bathrooms equipped with the necessary grab bars, non slip flooring?

We installed non slip grate shower flooring from Rubber Flooring Inc. Amazon has it. Others use water shoes to help a person feel more secure.

My mom always held onto the grab bar with a wash cloth. She felt more comfortable doing that.

Good luck.

Discovering WHY the client doesn't want to bathe would be a good first step.
Modesty?
Thinks they "just washed up yesterday", or closely the related reason, says they'll do it themselves tomorrow?
They find the experience is cold, unpleasant, scary, or ... ?

This is probably one of the most frequently asked questions. Here is a helpful article from the Care Topics page of this website:

https://www.agingcare.com/articles/how-to-help-with-bathing-and-personal-hygiene-top-tips-from-caregivers-212010.htm