Don't have the Mark Todd ones but anything I use goes in the machine in its own individual pillow-case/cushion cover, so they don't come out in a tangled mass of velcro, on short 30 degree cycle or 40 if they're really filthy
Thank you, they just look so big and quite rigid. I was a bit worried stuffing them in a machine would ruin them. I shall sneak them in when OH isnt looking