Well I found out that you shouldn't use the steamy bathroom method for installing glass protectors.
Put one on Tuesday when I received my 7 Plus. The protector condensated as I was applying so I have been waiting for a slight haze it had to dry out.
It didn't really clear so as i bought a two pack I decided to take it off and apply the other.
When I got it off the haze must have been the adhesive effected by the dampness as it wouldn't clean off.
So, did the other outside hoping the absence of household dust in the air would aid a clean install.
It did, went on perfect with one tiny, tiny speck of dust on the bottom right of the bezel, only visible in certain lighting.
Yay.