3 Principle Ingredients of Carpet Powder

I see no point in buying manufactured carpet deodorizer.   Why do so when it's mostly baking soda which is cheap?  I mix my own around three principle ingredients.  Baking soda is the main freshener, but salt and borax offer side benefits.

Baking soda:  it absorbs odor.  Awesome stuff.

Salt:  This can draw away stuff in the carpet, helping to brighten carpet color.

Borax:  While this can also absorb odor, I use it to repel bugs.

I also like to add essential oils.  Because those are fun.

Mix according to whatever recipe you like, sprinkle on carpet, wait awhile,  vacuum.