I wash daily and it actually helps me to keep tangles to a minimum. I used to wait so long in between washes, that I would have major tangles. So I made the assumption that my hair just tangles badly. But when I started to wash more often and detangle lightly with fingers throughout the week and with a comb once a week, I noticed that my hair didn't have enough time to form major tangles.
It is extra work for me to do this, but I never wear my hair straight so that helps. My hair seems a lot healthier for it. I also love that my hair smells fresh everyday.