I did something similar to this, when I was suffering from dandruff, the past 2 winters - and still do this the first washday after a color service.
I package a tablespoon of Shikaikai, Amla, Neem, Brahmi, Tulsi and Bhingraj powders into a large tea bag filter. I pour 2 cups of boiling water over one of these tea bags (4 cups over 2, when the dandruff was really bad and I just started treatment) and let steep for 30 min to 1 hour. No straining needed, just toss the used tea bag. Then just fill a few nozze bottles (for hair dye - from BSS) and your ready to go.
After scrubbing my scalp with BB Soy Poo and a little scalp scrubby pad (from BSS,) I rinse out the poo with plenty of warm water. I lean my head back and, keeping the nozzle close to the scalp, pour the liquid over my head. After that, I massage my scalp for a minute or two and then apply the condish of my choice (probably Trader Joe's Nourish. JessiCurl TooShea or EMBC,) let sit for a few minutes, while I soap and wash up the rest of me and then finally rinse my hair completely free of condish. (I wouldn't suggest leaving any of the condish in, unless you apply a second coat, after the tea & condish mix has been washed out. I fear it might cause irritation in some people.)
It has definitely worked well for my winter dandruff. I notice a difference after only 2 treatments and it's usually all gone after 4 or 5. (In winter, I wash 2x a week.)
It also helps remove any dye residue on my scalp much faster than regular poo or co-wash scrubbing. (I wait about 2-3 days after the color service to wash my hair.)
I'll give this treatment 4.5 stars! Took of one star since the powders can be a PITA to get, if you're not near a large East Indian population (and stores...) and they are sometimes out, too.
