You mean that the composition of the recyclables is 10% non-recyclable thus rendering the entire thing non-recyclable? That is indeed regrettable but it's never too late to change.
Take a fictional recycling truck driving through a residential neighborhood - 10% or more of the material inside the recycling bins is going to be contaminated 'wish-cycled' material, such as barbecue laden plastic plates, nylon ropes, grease-stained pizza boxes, and soiled paper products.