Ok guys, they are beginning to show a little dirt, but still too close to call and here we are on March 8th, about two weeks on ...
But we're getting some more of that light, drizzly patchy rain now so we'll see what that does!
BTW, I cleaned all the frames when I started, the left hand with wfp, the other two with old damp towel, like I would trad. So no spidy nests or residue left behind at the start.