Use coconut oil in its more solid form , the less proccessing the better for you and the less expensive. I buy it from the herb shop in 4 0z tubs she sells bigger ones too . I have had this one 4 oz tub for 6 months and I use it daily. I forget the price on it but it will be listed on the website. WWW.lifethymebotanicals.comx2. I figure if I am clean and using the towel just to dry off the (clean) water from the shower, then why would the towel need to be washed after? As long as it has a place to thoroughly dry, I will use the same towel for awhile. And yep, the same jeans go on day after day unless I kneel in chicken poop or get splashed in mud or spill something on them. Clothes (any fabric really) last a lot longer if they aren't washed too often.
I did try this a couple of years ago. The "recipe" I got from another forum was to use a couple of tablespoons of baking soda and massage that into the scalp, and then rinse with 1/4-1/2 cup of vinegar. At first I loved it - it sizzled up nicely and "felt" like it was doing good things for my hair. And the first few times, my hair felt really soft and clean afterward. But with extended use, I found I had some sort of build-up in my hair and it started to look dull and listless. So I went back to using a commercial shampoo. It might be something that is good to do some of the time, as long as you use a real shampoo intermittently to avoid the build-up.
Isn't coconut oil pretty expensive? My SIL uses it in cooking a lot since her family went paleo, but when I priced it once at the grocery store, I just couldn't put any in my basket because it was so high.