Where are the Nanoparticles?

Using a particular sunblock this week has left me with abraded, gritty, dry skin. It's very uncomfortable and I can't wait for my natural oils to return. And the reason for this unpleasant effect? Microparticles. If only the sunblock had used nanoparticles, I'd feel fine. But these enormous microparticles have wreaked havoc on my skin's ecosystem. Grrrrr.

You can experience the same squeaky dry skin affect by visiting Reykjavik's Blue Lagoon. Promoted as a panacea for many medical conditions, I emerged from it feeling as if the outer 2mm of my skin had been removed. It took a month to recover.