My daily routine is to detangle the mane and tail by hand, comb through - stopping to tease out any further tangles by hand - and then brush with a stiff brush. Apply a double handful of baby oil to both the mane and tail, work through with fingers, and lay the mane by hand. Then brush the oil through with the dandy brush to avoid having a greasy look to the mane and tail. I do not bathe her mane or tail.
I also feed cod liver oil, and apple cider vinegar, plus general purpose vitamins and minerals, including biotin.