Marketing annoyances aside, I've been wondering pretty much the same thing lately. Is ShamWow worth the hype?
What I use now is pretty good though... Two summers ago, I picked up a roll of shop towel. I can't even remember the brand name, but it is pale blue and quite heavy. It is incredibly durable... You can mop up nasty messes, scrub darkroom tables, rinse them or throw them in the laundry. Well, as I said, I bought this product nearly two years ago for something like $3... I still have half a roll left. It may not be Shamwow, but it's a constant in my darkroom. Next time I'm in the hardware store, I'll look to see the brand name.
Cheers,