Quoted from McCune:From what I have seen , Bleche wite has changed and is not longer as strong as it used to be . I recently bought some from Wallyworld ( hate that place) and noticed the bottle looked the same but did not say westley's on it anymore, all it says now is Black magic.
Are you sure this is true universally, and that they didn't just make a cheap knockoff for Walmart? Walmart really squeezes its suppliers hard on price, which drives down the quality of goods. Perhaps auto centers still have the real stuff?