I purchased a Zagg Apple iPad Air (Smudge) Screen Protector for my iPad Air back in Feb and now the screen discoloration is horrible, it turned yellow. Zagg will send a replacement to me for free just S&H, $3.99. It also lists some other protectors at discounted prices, ex: Apple iPad Air (Full Body) for just $10. Two questions. -Does that list mean I can order the Full Body screen protector even though that isn't the that protector I currently have that is damaged? - Is Full Body really necessary, I mean does anyone here really need a protector for the back of the iPad. Mine is mostly in the case 95% of time as my son uses it the most. Thanks.