I'm no chemist, but I've been using Powermax for 7 months now and I've figured out one particular thing about it - you MUST keep it from exposure to moisture before you use it. You MUST keep the lid on the container SEALED and not allow humidity to contaminate it before using it.
Like any enzyme (or any that I know of), once moisture is introduced to it, it is only effective for approximately 6 hours. After that, it becomes ineffective. Could it be possible that that Jim (or his employees) were not sealing the containers that they use to store it in, which would allow moisture to invade the product? Which, in turn, would cause the clumping he spoke of AND render the product ineffective.
I know I have seen this happen myself when I left Powermax exposed in an open container in my van. It clumped into small balls and its cleaning power was diminished.
Powermax is a GREAT cleaning product, but you have to take proper precautions to make sure its storage container is kept sealed and protected from moisture/humidity until you're ready to use it.
Again, I'm no chemist, but wouldn't adding an oxidizer ENHANCE the cleaning power of ANY product?
I like Larry's product. And I consider myself an unbiased user becaused I was FORCED to use this product by my contractor. I was VERY apprehenisve at first. But, after using this product for several months I have become a firm believer in its effectiveness and usefuleness. You just have to make sure it's storage container is properly and firmly sealed.
James