I have a feeling that cling-film doesn't "keep" very well and that if you get a roll that has been on the shelf too long, it is murder to unroll.
But this could just be may aging fingers loosing strenght I suppose.
What baffles me about cling-film is, when I finally get it off the roll it sticks to itself, but obstinately refuses to seal the dish or plate I am attempting to cover!
Why in an age where we are trying to limit waste in the interests of the environment, are we still using the blasted stuff? Air -tight fridge dishes exist after all.