Frighten of Water/ Hose

Does anyone have any ideas on how I can get my horse too not be frighten of the hose? I try to give her a bath with the hose and she starts to flip out. I want to make it a positive experience for her. I am just not sure how to go about it. Please help!

Start slowly, only spritzing around her feet. Lots of praise and reward. Also, don't tie her. Hold onto her and let her move around. That seems to help a bit, so they won't panic as much.

Thanks for the advice I wil try that and let you know how it works.