Iodine supplementation is helpful and I still do it, although not religiously.
I believe the hashimotos is a result of other problems, specifically adrenal fatigue.
If you think about it, most people's lifestyles today over stresses the adrenals. Stress from work and busy family life, stressful music (rock-style beats (syncopated) stress the adrenals significantly, even "soft rock" and jazz), stress from world events, overstimulation such as online activities like gaming and the like, TV which now does not show a continuous scene from start to finish-it's all chopped up in 5 second bits causing a significant stress on our bodies.