There is no ârightâ way to whiten teeth naturally with activated charcoal. Koreans put it in their toothpaste, Crunchy Betty swishes with it, and some people simply brush it on straight. Open a capsule of activated charcoal (about 1/8 teaspoon) and pour about half into a cup.
The rear-facing camera on Surface 3, Surface Pro 4, and Surface Book has an autofocus lens that can help improve the sharpness of your photos and videos. The lens automatically focuses on the main subject on the screen, but you can change the focus to a different area before taking a picture or while recording a video.
United and British Airways are the only two carriers to offer front AND rear-facing business class seats. United said it can fit more business class seats into the cabin this way-- and has received few complaints from rear-facers. Here's another angle so you can see what I mean by forward and rear-facing seats. All biz class seats now have a power plug, USB 2.0 plug and iPhone/iPod input plug.