Regarding the wee wee on the mattress: currently I have 15 cats (the number goes up and down), and although I suspect Spike was the culprit, I didn't catch him in the act so can't be sure. I've seen cats with UTIs before, including Spike, and none of my cats is showing any signs of a urinary infection. I suspect that someone was displaying disatisfaction about something. As for keeping the cats away from the bed--yes, that would solve the problem from occurring again, but I like to sleep with my cats, and they like to sleep with me. In any event, the question was about the mattress and how to get out the urine that has undoubtedly seeped beneath the mattress cover into the inside of the mattress. Do I just wipe the surface and give the bed a good airing, or do I actually pour enough water and odor remover onto the mattress to give it a good soak?