cat mess cleaners

does that natures miracle work ina shampooer? or do you just spray it or what?? i have a shampooer, will it work if i mixed some of it in there? i have one of my rooms just soiled in cat pee.. i dont know if its a territory thing because of previous cats that was here, or the stuff im usin just aint working... she keeps goin there, seems like she waits to do it when im lookin, she pees on the floor, but poos in the box, which is in the same room.
rank you, lol

The Feeder,I find that Lysol does an excellent job,of keeping the Found Cat Hotel clean! Also Wipe Ups,and Clorox Bleach! And Scouring Pads!