My dog pees on her own bed

Question
Ok, so I have read all over the internet on why dog's pee on things. It's so they can mark their territories, etc. Well, I have a 1 year old dog that's spayed, and she pee's on every dog bed I give her and every blanket I give her. Then she wont sleep on them at all until I wash the bed or blanket. I really hope this isn't going to be a battle I cant win, so what should I do??? Also, she doesn't have anything wrong with her urinary tract or anything, shes just a happy dog that pee's on her beds, and I could really use some good advice on how to stop her from doing so :)
                         Thank you.

p.s. I tried all the sprays people told me to buy. They arent working very well. lol

Answer
This is a dominance thing,and there's a couple of things that will reduce or get rid of it altogether

The first is to put her in a crate at night and when you are out withOUT and blankets ect if you want her to lay on something soft,you can put papers in there,it will keep her warm but incase she decides to go,you can just toss them

Also another thing that will help is obedience classes as that puts you as the top dog,and that might stop it-as she is trying to be in control