Nike Shox Monster Review

I am working in a child care. Nike Shox are the best shoes to wear during my working time. However, due to my job, the shoes are getting dirty easily and I am really wonder how to clean them. I heard that Nike Shox are not suppose to be washed in the washing machine. I tried to spray the "instant sneaker cleaner spray" that I bought from a sporty house, sadly it didn't help much. Next, I tried to use some eucalyptus oil, again it didn't react at all. Finally I tried to hand wash slowly. Still ongoing process, yet no idea if it really works. Gotta spend so much time in it. Does anyone can share with me how to clean my lovely Nike Shox in easier and effective way? In advance, thank you very much.