Wouldn't rely on it as a stand alone cleaner,
This review is from: Vanish Powerpowder 650 g (Grocery)
Customer review from the Amazon Vine Programme (What's this?)
This product is slightly damp powder that you sprinkle onto your carpet,brush it in then leave for 20 minutes then vacuum off.
I had my carpet cleaned last August and just wanted to brighten it up again and lift the pile a bit ready for Christmas guests. I was disappointed with the fragrance, I was hoping it would smell like a nice fabric conditioner scent but the scent isn't noticeable at all.
The instructions say to use a soft brush to sweep the powder into the pile but I found the powder quite lumpy in places and hard to sweep into my carpet. I didn't notice any spectacular difference but to be fair my carpet is dark brown so it could be that you might notice the difference better with a lighter coloured carpet. It didn't lift the pile on the hard traffic area but did lift it in the less walked on areas of the carpet.
All in all I wasn't over impressed but it's okay to freshen up small areas but I wouldn't rely on it as the only form of carpet cleaner to be used.