LOGO AND SLOGAN

I am going to design a logo and slogan of my product.

first, i need to understand some information about my product .

1.  this product is a spray 
2. this product can protect your shoes and keep your shoes clean.

so, i need to emphasize the function use a word, that is 'clean'. because I want to use the most direct way to express the function of my product. This series of products are use dark colours, so I also continue to use this colours to design a logo.

now, i use the photoshop to design a logo.

1. I built a circular selection and then filled the black.
2.  I built a rectangle selection and  delete it.
3. I write a word and use two colors to design , because i want to say the write word in the black area that is mean 'clean '

this is my final design .

and I replaced the original logo .

the first i designed the slogan was ' never dirty ', but the teacher this is negative, and the teacher suggest me to change. thus i use ' keep your shoes clean ' as my slogan .