Why dont the products I they use on my hair at the salon look as good at home?

I went to the salon. They washed and conditioned my hair. They used a defrizzer on my hair. When she put it on, my hair looked sleek but when i put it on, it looks greasy. Is there someway to put it on that I am missing? I didnt get to see what she was doing because her cord was short and she had to have me turned away from the mirror. She also used some root powder and root boost in my hair. Are these both necessary? They are pricey so do you have products like these that work for you? Then she used a flat iron...how do you use the darn thing? Thanks for any help. I love the way she did it and would like to figure it out.Why dont the products I they use on my hair at the salon look as good at home?
too much product will make your hair greesy looking- not enough and you cant tell a dfference. its tricky but you have to find the right amout. and your hair never looks as good as it does after the solon- its a ruleWhy dont the products I they use on my hair at the salon look as good at home?
Because they are professionals.