Reading the learning center is good advice. Also, asking questions about hub standards is best done in the forums, you may find the question here is removed by HP.
Okay, I had a quick look at your hub. First impressions are
It's rather short. You may need a new subject for a hub as this one is naturally short.
No photo attribution. You have to write where the picture comes from and make sure it's used legally. The learning center helps with this.
Next to last sentence..."this solution will hell you." Double check what you have written. It's easy to make little mistakes.
In your instructions, you wrote, "Gently clean the metal area with great force." Do you mean great care? With force is not gentle.
Also, it's better to break up writing into smaller paragraphs. Your introduction is all in one block.
Hope this gives you some pointers to work on. Good luck.