Does anyone know what will happen if I use Vanish Oxi Action Crystal White then line dry my clothes in the sun? Bought a tub to use as I have some sheets and school tops and socks that are looking grubby but on the back it says to dry away from direct heat and light after using (begging the question how the hell you are supposed to dry things) but I prefer to line dry during all this nice weather. I've never used it before - are my sheets going to fall apart if I rebel and line dry in the garden?!?