So I have just done this:
Washed the cover inside out on the car.
Then I took it off an washed the car.
Then I placed the cover back onto the car wet but the correct way up.
Lastly washed the outside of it.
I used a sponge with auto glym shampo and got the oil and cat paw prints off with engine machine cleaner.
rinsed off with the garden hose.
Is it bad to leave it on to dry in hot weather?