[quote BasinHaircut]@notsorighteousthesedays interesting 
I’ll just get rid of him and I can wash all the bedding as I wish and also won’t have to worry about sweaty man head.
Last time I looked in Primark they didn’t have any super king bedding? I have found there to be much less choice around, and what there is, is not £20 a set.[/quote]
Try Asda or Tesco.
It's not the quality of your Kath Kidston stuff (or whatever), but washes surprising well and does the job.
We have three spaniels sleeping on the bottom of our bed (judge me if you like - frankly, my dears, I don't give a damn!). They sleep on a dog blanket, but even so, our duvet covers get grubby quickly and are therefore changed twice-weekly. Wash on 30, - I use Method for preference, but otherwise whatever is on special offer at the supermarket when I'm shopping that week - come out nice and clean. I have four sets and rotate them. Two sets only of bottom sheets and 2nd pillowcases because dogs aren't encouraged in the bed (I'm indulgent but not stupid).
My DH also has Sweaty Manhead Syndrome. I also suspect that he drools in his sleep. His pillowcases are always disgusting. I am tempted to removed them using both Marigolds and tongs. They also wash well on 30.
However, I do have pillow protectors to - er, protect the pillows, because Manhead Sweat is perfectly capable of penetrating a cheap pillowcase - and possibly an expensive one, too.