We have stall mattresses and make sure all the urine is cleaned up promptly, but there is still a lingering smell. We discovered StableFresh while having our horses winter blankets cleaned at Wilsun and now we CANNOT go without!! I usually pick up the 6 concentrated bottles but this last order, I took advantage of the free shipping. It doesn’t get any easier! Typically now we just spray the stalls on the weekend. It has made a huge difference in smell!