"Rain check that. If you're offering, I need to make it worth the while to ask." Patting his hand, Tony was clad in a thermal shirt, sweat pants and socks as he backed into the tent. "You know what else this thing has? Self-cleaning functions. Dirt particles are a thing of the past with the freshness directive. Light hits it, excites the nanoparticles and they degrade organic matter just like that."