A few weeks ago I mentioned that I deep condition my hair and scalp with a hair mask once a week. It's a super simple DIY recipe, and works better than any masks I've bought (and gets rid of dandruff far better than T-Gel). Also, it's super cheap!! Here's what I do.
(I buy the coconut and castor in the large containers for the lowest price per oz, since I also use them for other things)
Extra Virgin Coconut Oil
Tea Tree Oil
Combine equal parts castor oil with extra-virgin coconut oil (I melt it first), add 10-20 drops of tea tree oil, and stir well to combine. I keep mine in a little sealed Rubbermaid snack-sized cup in my bathroom. It's easiest to use if you wait until it has cooled completely back down. Now scoop out a little bit at a time and massage thoroughly into scalp with your fingertips. Depending on how much time you have, here's the options: 1) put a shower cap over the whole mess and go to sleep. Wash out in the morning. 2) leave in for 30 minutes - several hours. Wash out thoroughly.
Castor oil is really thick, so it usually takes me 2-3 washes to get it all out, but I like how shiny and healthy my hair looks and feels after, and I LOVE having a healthy scalp with no more itching and flakes!
Because my skin reacts so much to the dry winter weather, I do this mask once a week. Find what works for you and let me know in the comments!