@paisleybrew
That are a lot of hot/dead pixels, iso 1600 is mostly clean on my 6d.
You can give the body cap/ manual lens cleaning thing another try.
But now do it with a warmed up sensor...
Put the body cap on, go into liveview/videomode and put the iso up high, iso 6400 for example.
Let it stay in live view on iso 6400 for a while, half a minute or so ?
And the do the manual lens cleaning thing.
This way your sensor is warmed up and has more hot pixels to be remapped by camera.
Hope this helps
