I make my own plant extracts, so i usually just add some to a pot after decocting relevant herb material if adding any.
My favorite bath for cleansing, purifying, protection, charging incorporates Vervain (verbena officianalis), Angelica Archangelica, and elderflower with my own relevant chants/poems associated with each, sort of like “activating” the channel with the plant spirit. Ive found it cleansing, rejuvenating, beautifying and amped up for more work. I also like to burn white copal or other resins, so the bathroom is full of steam and smoke.
On particularly spiritually “dirty” days, ive felt the energy channels open throughout my body like things are cycling through with actual physical sensations almost like electricity and stripped of anything clinging. When i regularly take these baths, its less cleansing and more empowering, like infusing their power within me for my work, and ill try to proceed within an hour or two after.
For day-to-day showers, if i just need a quick cleanse and protect, ive begun incorporating a few drops of vervain or angelica in a cup filled with water, that i call to and pour over myself in conclusion.